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Schluter DITRA30M Installation Guide

1. Other Considerations tightly butted and or tented plywood or OSB seams must be addressed prior to installing DITRA and DITRA XL vapor barrier on crawl space floors according to regional building codes where a waterproof floor is required all DITRA and DITRA XL seams and floor wall transitions must be sealed with Schluter KERDI BAND using unmodified thin set mortar see page 14 D W19 T 15 Ceramic or porcelain tile Unmodified thin set mortar DITRA or DITRA XL uncoupling membrane Latex p c mortar Single layer of plywood or OSB Joists I joists or trusses D W24 T 15 Ceramic or porcelain tile Unmodified thin set mortar DITRA or DITRA XL uncoupling membrane Latex p c mortar Double layer of plywood or OSB l joists or trusses 19 2 488 mm o c joist spacing single layer OSB or plywood subfloor Areas of Application over any even and structurally sound OSB plywood subfloor with 19 2 488 mm o c joist spacing interior dry or wet areas Limitations minimum 2 x 2 50 mm x 50 mm tile for natural stone see detail D W S page 8 and natural stone discussion page 26 Requirements maximum spacing of joists I joists or floor trusses is 19 2 488 mm o c minimum subfloor thickness 23 32 3 4 nom 79 mm tongue and groove with 1 8 3 mm gap between sheets Substrate Preparation verify that subfloor panels are properly fastened to f
2. Underlayment Gap all panel edges 1 8 5 mm Plywood OSB underlayment Plywood OSB subfloor 2 P 1 4 point of the joist spacing Abut underlayment at 1 4 point of joist spacing typical Fasteners penetrate total thickness of underlayment amp subfloor with minimal penetration into joists Typical wood G floor joist spacing Plywood OSB Type and Fastener Schedule Guidelines Plywood OSB Plywood OSB Maximum On Center Fastener Spacing in mm Grades Thickness in mm Panel Edges Field Exposure 1 3 8 10 4 102 60 52 plugged face 1 2 13 4 102 6 152 plywood or OSB Greater than 1 2 13 6 152 6 152 The following guidelines must be followed when fastening underlayment panels 1 Use ring shank nails no staples or wood screws no drywall screws 2 Fasteners must pass through entire thickness of underlayment and subfloor panels with minimal penetration into joists See figure 2 FINAL WORD As stated previously Schluter Systems requires that any underlayment panel must have a minimum thickness of 3 8 10 mm When in doubt increase underlayment thickness WOOD UNDERLAYMENT 21 Easy Step by Step Installation A step by step installation video is available E mail us at info schluter com or call us at 1 800 472 4588
3. USA or 1 800 667 8746 Canada To see a video clip go to www schluter com Using a thin set mortar that is suitable for the substrate apply the thin set mortar mixed to a fairly fluid consistency but still able to hold a notch using a 1 4 3 16 6 mm x 5 mm V notched trowel 5 16 x 5 16 8 mm x 8 mm V notched trowel or the DITRA trowel which features a 11 64 x 11 64 4 5 mm x 4 5 mm square notched design Apply DITRA or DITRA XL to the floor fleece side down Solidly embed the matting into the bonding mortar using a float screed trowel or Schluter DITRA ROLLER please observe the open time of the bonding mortar When using the DITRA ROLLER place a weight e g bag s of mortar grout or box of tile not to exceed 75 lbs on the DITRA ROLLER shelf Slowly move the roller from one end of the matting to the other slightly overlapping successive passes Tile can be installed over DITRA and DITRA XL immediately no need to wait for the mortar to cure Fill the cut back cavities with unmodified thin set mortar and comb additional mortar over the matting using a trowel that is appropriate for the size of the tile Solidly embed the tiles in the setting material Periodically remove and check a tile to ensure that full coverage is being attained Back buttering is a useful way to helo ensure proper coverage particularly when installing large format tiles 12 x 12 305
4. which m tiled surface 1 ER Since DITRA is virtually incompressible within the tile assembly the advantages of uncoupling are achieved without sacrificing point load distribution capabilities By addressing all of the challenges associated with today s fast lightweight construction methods DITRA provides a durable installation system for ceramic and stone tile over gypsum substrates D G TS 15 Ceramic or stone tile Unmodified thin set mortar DITRA or DITRA XL uncoupling membrane Unmodified thin set mortar Gypsum concrete Floors Interior Gypsum concrete Areas of Application over gypsum concrete underlayment placed over structurally sound wood or concrete subfloors interior dry or wet areas Limitations minimum 2 x 2 50 mm x 50 mm tile Requirements for wood substrates subfloor underlayment configuration according to detail D W16 T D W19 T D W24 T or D W24 XL T D W24 XL T for use with DITRA XL only where radiant heat tubes are laid over the subfloor gypsum poured to a height that is 3 4 19 mm above the tops of the tubes is required before installing DITRA and DITRA XL residual moisture in gypsum screed 2 0 percentage by volume or less before installing DITRA and DITRA XL Substrate Preparation gypsum follow manufacturer s directions Movement Joints DITRA and DITRA XL do not eliminate the need for movement joints including perimeter joints
5. which would be most prone to cracking in service over a bending substrate 6000 5236 amp 5000 4485 4241 e 4000 T o LL 3000 5 2490 2438 UO 8 2000 1856 1488 E 1000 539 337 0 Porcelain A Ceramic B Porcelain B Granite Ceramic A White Carrara Slate Crema Marfil Travertine It is clear from the figure that the minimum recorded flexural strengths of these dimension stones tend to be significantly less than those of the ceramic tiles In some cases the differences are dramatic For example the minimum recorded flexural strength of the weakest travertine sample 337 psi was only 1496 of the minimum flexural strength of the weakest ceramic sample 2438 psi In other words the weakest ceramic sample was more than 7 times as strong as the weakest travertine sample As another example the minimum recorded flexural strength of the weakest porcelain sample is more than 12 times as strong as the minimum recorded flexural strength of the weakest travertine sample Q Why does Schluter Systems recommend a double layer wood floor for installing natural stone over DITRA and DITRA XL A There are three principle reasons 1 As illustrated above the fact that most stone products have a minimum flexural strength that is substantially lower than what is typical for ceramic tile 2 Stones are products of nature and complex heterogeneous materials with naturally occurring regions of discontinuity
6. within the tiled surface Movement joints must be installed in accordance with industry standards and norms see page 18 of this Handbook TCNA EJ171 and TTMAC 301 MJ Ceramic Stone Tile Setting and Grouting Materials unmodified thin set mortar ANSI A118 1 grout ANSI A118 3 A118 6 A118 7 A118 8 Installation Specifications tile ANSI A108 5 grout ANSI A108 6 A108 9 A108 10 gypsum follow manufacturer s recommendations Other Considerations since DITRA and DITRA XL must bond to the gypsum concrete follow gypsum manufacturer s recommendations regarding primers and or special surface preparation before installing DITRA and DITRA XL where a waterproof floor is required all DITRA and DITRA XL seams and floor wall transitions must be sealed with Schluter KERDI BAND using unmodified thin set mortar see page 14 certain moisture sensitive stones green marble or resin backed tiles may require special setting materials Consult stone supplier and Schluter Systems for more information vapor barrier on crawl space floors according to regional building codes GYPSUM Floors Interior Ceramic or Stone 1 Every substrate presents unique challenges Radiant heating is one of the fastest growing market segments in the construction industry Unlike other surface coverings the low thermal resistivity of ceramic and stone tiles allows them to be used in radiant hea
7. x 1 8 3 mm x 3 mm 6 units PRODUCT amp ORDERING INFO 31 Schluter DITRA ROLLER Schluter KERDI FIX Used to embed DITRA membranes in the bond coat during membrane installation The lightweight DITRA ROLLER features a 14 1 2 87 cm wide roller and a shelf for placing 50 to 75 lbs of weight e g bag of thin set mortar or grout box of tiles etc Between uses it can be conveniently disassembled for transport and storage Schluter DITRA ROLLER Used to embed DITRA in the bond coat Item No Width DIRO 14 1 2 37 cm KERDI FIX is a single component sealing and bonding compound with a silane modified polymer base is odor neutral UV and weather resistant and contains no solvents KERDI FIX is elastomeric and bonds well to most materials such as wood stone concrete metal glass and many plastics KERDI FIX is suitable for the bonding of KERDI waterproofing membrane to Schluter BARA balcony profiles and to vertical sections of floor wall transitions that will not accept a bond to unmodified thin set mortar KERDI FIX is also suitable for use as a sealant or as a joint filling Compound Schluter KERDI FIX Sealing and bonding compound Item No Description KERDIFIX color Cartridge 290 ml Color Codes 48 Bright Grey white 32 PRODUCT amp ORDERING INFO Schluter DITRA
8. 8 nom 10 mm Substrate Preparation verify that subfloor panels are properly fastened to framing members underlayment minimum 11 32 3 8 nom 10 mm thick Exposure 1 plugged face plywood or OSB with 1 8 3 mm gap between sheets see page 21 for underlayment installation guidelines any leveling of the assembly must be done prior to installing DITRA and DITRA XL Movement Joints DITRA and DITRA XL do not eliminate the need for movement joints including perimeter joints within the tiled surface Movement joints must be installed in accordance with industry standards and norms see page 18 of this Handbook TCNA EJ171 and TTMAC 301 MJ Setting and Grouting Materials latex portland cement p c mortar ANSI A118 11 unmodified thin set mortar ANSI A118 1 grout ANSI A118 3 A118 6 A118 7 A118 8 Setting and Grouting Specifications a tile ANSI A108 5 grout ANSI 108 6 108 9 A108 10 Other Considerations certain moisture sensitive stones green marble or resin backed tiles may require special setting materials Consult stone supplier and Schluter Systems for more information tightly butted and or tented plywood OSB seams must be addressed prior to installing DITRA and DITRA XL vapor barrier on crawl space floors according to regional building codes where a waterproof floor is required all DITRA and DITRA XL seams and floor wall transitions
9. Testing reveals that this increase 15 significant Four assemblies incorporating natural stone installed with DITRA XL over single layer plywood subfloors were tested according to the ASTM C627 Standard Test Method for Evaluating Ceramic Floor Tile Installation Systems Using the Robinson Type Floor Tester as shown below Joist Spacing Stone ASTM C627 Test Results Rating TCNA Test Report Number 19 2 6 6 White Carrara 12 cycles Heavy TCNA 121 07 A 24 O C White Carrara 7 cycles Light 121 07 B 24 O C Crema Marfil 5 cycles Residential TCNA 441 07 24 O C Travertine 5 cycles Residential TCNA 444 07 Test Setup 2 x 2 joists APA rated Exposure 1 tongue and groove plywood subfloor 23 32 3 4 nom thickness Latex portland cement mortar ANSI A118 11 Schluter DITRA XL Unmodified thin set mortar ANSI 118 1 Stone 12 x 12 x 3 8 nom for each type Polymer modified cement grout ANSI A118 7 EE These test assemblies represent demanding conditions given the bending and deflection of the single layer plywood subfloor under loading and keeping in mind the lower flexural strengths of these types of stones The results indicate that DITRA XL provides superior movement accommodation to limit stress transfer and protect the natural stone surface covering against damage It should be noted that one limitation of the ASTM C627 test is that test specimens do not include seams or butt jo
10. accordance with industry standards and norms see page 18 of this Handbook TCNA EJ171 and TTMAC 301 MJ Setting and Grouting Materials latex portland cement p c mortar ANSI A118 11 unmodified thin set mortar ANSI A118 1 grout ANSI A118 3 A118 6 A118 7 A118 8 Setting and Grouting Specifications a tile ANSI 108 5 grout ANSI 108 6 108 9 A108 10 Other Considerations vapor barrier on crawl space floors according to regional building codes where a waterproof floor is required DITRA and DITRA XL seams and floor wall transitions must be sealed with Schluter KERDI BAND using unmodified thin set mortar see page 14 certain moisture sensitive stones e g green marble or resin backed tiles may require special setting materials Consult stone supplier and Schluter Systems for more information WOOD Floors Interior 9 CONCRETE Every substrate presents unique challen ges There are various challenges associated with the installation of hard surface coverings on concrete substrates To begin the coefficient of thermal expansion of concrete is close to twice that of ceramic tile Additionally tile contractors are often expected to install tile over young concrete concrete cured less than 28 days However rigid surface coverings installed over young concrete are susceptible to damage as a result of shrinkage during curing Pre stressed post tensioned concre
11. and at transitions to walls and other restraining structures to allow movement of the assembly and prevent stresses that can damage the system Schluter Systems prefabricated movement joint profiles protect tile edges and prevent sound bridges and surface water penetration resulting in a permanent maintenance free installation The family of Schluter DILEX prefabricated movement profiles includes a variety of shapes sizes and materials to suit different applications Please see Schluter Systems Illustrated Price List and visit www schluter com for more detailed information on DILEX movement profiles TECHNICAL NOTES The Tile Council of North America TCNA and the Terrazzo Tile and Marble Association of Canada TTMAC provide guidelines EJ171 and 301Mu respectively for the placement and construction of movement joints in and around the tile field Schluter oystems accepts these guidelines However given the increased use of larger tiles smaller grout joints and lighter building materials which are more susceptible to movement Schluter Systems recommends that movement joints within the tile field be placed at more frequent intervals as indicated below Guidelines for the placement of movement joints Field size not to exceed 400 ft 37 0 mr Interior applications 16 20 4 9 m 6 1 m in each direction Interior areas exposed to direct sunlight moisture or heated floors 12 16 3 7 m 4 9 m in each direct
12. any leveling of the assembly must be done prior to installing DITRA and DITRA XL Movement Joints DITRA and DITRA XL do not eliminate the need for movement joints including perimeter joints within the tiled surface Movement joints must be installed in accordance with industry standards and norms see page 18 of this Handbook TCNA EJ171 and TTMAC 301 MJ Setting and Grouting Materials fast setting latex portland cement p c mortar ANSI A118 4 or ANSI A118 11 unmodified thin set mortar ANSI A118 1 grout ANSI 118 3 A118 6 A118 7 118 8 Setting and Grouting Specifications tile ANSI A108 5 grout ANSI 108 6 A108 9 A108 10 Other Considerations DITRA and DITRA XL are adhered to the vinyl flooring using a fast setting latex portland cement mortar suitable for bonding to vinyl As an alternative a suitable cement based embossing leveler or an appropriate latex modified thin set mortar can be used to skim coat the vinyl to provide a bonding surface When skim coat is cured DITRA and DITRA XL are adhered to the skim coat using an unmodified thin set mortar See page 23 for discussion on latex modified thin set mortars sandwiched between two impervious layers seaming DITRA and DITRA XL including floor wall connections with Schluter KERDI BAND may be appropriate in cases where a break in the water line of an ice maker or dishwasher can damage existing moisture sensitive
13. cured less than 28 days or below grade concrete subject to moisture migration cracked concrete Limitations minimum 2 x 2 50 mm x 50 mm tile concrete slabs subject to moisture migration must have all seams in DITRA and DITRA XL sealed with Schluter KERDI BAND using unmodified thin set mortar any cracks in concrete subfloor must exhibit in plane movement only thin set tile assemblies including those incorporating DITRA or DITRA XL cannot accommodate differential vertical displacement Requirements Slab to be structurally sound Slab to be free of waxy or oily films and curing compounds when present mechanical scarifying is necessary the installation of DITRA or DITRA XL and tile can begin as soon as the slab can be walked upon Substrate Preparation any leveling or sloping of the slab or assembly must be done prior to installing DITRA and DITRA XL Movement Joints DITRA and DITRA XL do not eliminate the need for movement joints including perimeter joints within the tiled surface Movement joints must be installed in accordance with industry standards and norms see page 18 of this Handbook TCNA EJ171 and TTMAC 301 MJ concrete floors may incorporate various movement joints see page 19 of this Handbook for guidelines on how to treat the different types of joints control contraction joints expansion joints etc Setting and Grouting Materials unmodified thin set m
14. curing compounds when present mechanical scarifying is necessary all seams in DITRA and DITRA XL and floor wall transitions must be sealed with Schluter KERDI BAND using unmodified thin set mortar see page 22 Substrate Preparation sloping of the slab or assembly must be done prior to installing DITRA and DITRA XL Movement Joints DITRA and DITRA XL do not eliminate the need for movement joints including perimeter joints within the tiled surface Movement joints must be installed in accordance with industry standards and norms see page 18 of this Handbook TCNA EJ171 and TTMAC 301 MJ concrete floors may incorporate various movement joints see page 19 of this Handbook for guidelines on how to treat the different types of joints control contraction joints expansion joints etc Setting and Grouting Materials unmodified thin set mortar ANSI A118 1 amp grout A118 6 A118 7 Setting and Grouting Specifications tile ANSI A108 5 grout A108 10 EXTERIOR APPLICATIONS Exterior Concrete Floors Patios and Walkways 5 D EXT OS 15 1 Concrete or wood structure For wood substrates subfloor underlayment configuration according to detail D W16 T D W19 T D W24 T or D W24 XL T D W24 XL T for use with Schluter DITRA XL only 2 Roofing membrane The roofing membrane must be sufficiently sloped 1 5 2 and is necessary for the proper function of the assembly 3 Schluter TRO
15. for more information Schluter DITRA HEAT is an uncoupling membrane designed to secure heating cables without encapsulating them in leveling compounds see schluter com for more information D RHTS 15 Ceramic or stone tile Unmodified thin set mortar DITRA or DITRA XL uncoupling membrane Unmodified thin set mortar Lightweight or gypsum concrete Even and structurally sound substrate D RHSS 15 Ceramic or stone tile Unmodified thin set mortar DITRA or DITRA XL uncoupling membrane Unmodified thin set mortar Concrete Wood Substrate Thin slab lightweight or gypsum concrete Areas of Application over lightweight or gypsum concrete thin slab placed over structurally sound wood or concrete subfloor interior dry wet areas Limitations minimum 2 x 2 50 mm x 50 mm tile Requirements afor wood substrates subfloor underlayment configuration according to detail D W16 T D W19 T D W24 T or D W24 XL T D W24 XL T for use with DITRA XL only where radiant heat tubes are laid over the subfloor gypsum or concrete fill poured to a height that is 3 4 19 mm above the tops of the tubes is required before installing DITRA and DITRA XL residual moisture in gypsum concrete 2 0 percentage by volume or less before installing DITRA and DITRA XL Substrate Preparation gypsum or concrete follow manufacturer s directions and or design specifications additional
16. incorporating an uncoupling layer or forgiving shear interface within the tile assembly DITRA provides uncoupling through its open rib structure which allows for in plane movement that effectively neutralizes the differential movement stresses between the substrate and the tile thus eliminating the major cause of cracking and delaminating of the tiled surface Waterproofing DITRA provides reliable waterproofing in interior and exterior applications Its polyethylene composition protects the substrate from moisture penetration which is particularly important in today s building environment where most substrates are moisture sensitive Vapor Management The distinguishing feature of DITRA is the existence of free space created by the configured channels on the underside of the matting The free space provides a route for excess moisture and vapor to escape from the substrate that could otherwise cause damage to the tile layer above Thus DITRA effectively manages moisture beneath the tile covering Support Load Distribution When placed on a solid foundation columns or pillars can support tremendous loads The same physical principle applies to DITRA installations Column like mortar structures are formed in the cutback cavities of the matting Loads are transferred from the tile covering through these column like mortar structures to the substrate Since DITRA is virtually incompressible within the tile assembly the advantages of uncoup
17. mm V notched trowel or the Schluter KERDI trowel which features a 1 8 x 1 8 8 mm x 3 mm square notched design Using the flat side of the trowel firmly press the 5 727 mm wide At all wall junctions apply a 10 254 mm wide strip of KERDI BAND as described in steps 1 3 centered where the wall and floor meet Schluter KERDI BAND into the mortar to ensure 100 coverage and to remove excess mortar and air pockets Notes KERDI BAND must lap DITRA and DITRA XL at seams and at floor wall transitions by a minimum of 2 60 mm in order to maintain waterproof integrity In some applications the vertical section of the floor wall transition will not accept a bond to unmodified thin set mortar Connections to such elements can be achieved using Schluter KERDI FIX or suitable trowel applied waterproofing materials such as those that require atmospheric moisture to cure e g urethane sealant 22 INSTALLATION THIN SET FACTS Discussion of thin set mortars and Schluter DITRA installations QUESTION Can ceramic tile including porcelain tile be set on DITRA with unmodified thin set mortar ANSWER YES In fact we recommend it Here s why Portland cement based unmodified thin set mortars are dependent on the presence of moisture for hydration in order to gain strength Since DITRA is impervious it does not deprive the mortar of its moisture This allows the cement to properly hydrate resulting in a strong den
18. mm x 305 mm and larger Lift up a corner of the matting to check coverage Proper installation results in full contact between the fleece webbing and the thin set mortar Simply abut end and side sections of adjacent sheets Note Coverage may vary with mortar consistency angle at which the trowel is held substrate flatness etc If full coverage is not achieved remove and reapply making sure to verify proper mortar consistency and application In some cases it may be beneficial to use a trowel with larger notches such as 1 4 1 4 6 mm x 6 mm square notched trowel for DITRA XL ESTIMATED THIN SET COVERAGE To bond DITRA and DITRA XL to the substrate Use one 50 Ib 22 68 kg bag of mortar per 150 200 ft 13 9 18 6 mr To bond the tile to the DITRA using a 1 4 x 3 8 6 mm x 10 mm square or U notched trowel Use one 50 Ib 22 68 kg bag of mortar per 40 50 ft 3 7 4 6 To bond the tile to the DITRA XL using a 1 4 x 3 8 6 mm x 10 mm square or U notched trowel Use one 50 Ib 22 68 kg bag of mortar per 35 45 ft 3 3 4 2 Waterproofing The following steps are required for waterproofing only At the joints fill the cut back cavities with unmodified thin set mortar approximately 8 203 mm wide centered over the joint Comb additional unmodified thin set mortar over the joint using a 1 4 x 3 16 6 mm x 5
19. must be sealed with Schluter KERDI BAND using unmodified thin set mortar see page 14 Tile or wood base Ceramic or stone tile RONDEC DILEX EKE Unmodified thin set mortar KERDI BAND DITRA or DITRA XL uncoupling membrane Fast setting latex p c mortar Existing vinyl Plywood or OSB Joists l joists or trusses D SP TS 15 Ceramic or stone tile Unmodified thin set mortar DITRA or DITRA XL uncoupling membrane Latex p c mortar Plywood or OSB underlayment Structural plank subfloor Joists Floors Interior Existing Vinyl Floors Areas of Application over any even and structurally sound substrate with existing vinyl flooring interior dry wet areas Limitations minimum 2 x 2 50 mm x 50 mm tile cushioned vinyl unacceptable perimeter bonded vinyl flooring unacceptable multiple layers of vinyl unacceptable Requirements for wood substrates subfloor underlayment configuration according to detail D W16 T D W19 T D W24 T D W24 XL T or D W S D W24 XL T for use with DITRA XL only Substrate Preparation ensure that the structure beneath the vinyl is sound and adequate ensure that vinyl is well adhered remove any wax and clean vinyl for wood substrates nail off floor with ring shank flooring nails every 4 102 mm o c fasteners must pass through entire thick ness of assembly with minimal penetration into joists
20. substrate preparation according to heating system manufacturer s directions Movement Joints DITRA and DITRA XL do not eliminate the need for movement joints including perimeter joints within the tiled surface Movement joints must be installed in accordance with industry standards and norms see page 18 of this Handbook TCNA EJ171 and TTMAC 301 MJ Setting and Grouting Materials unmodified thin set mortar ANSI A118 1 grout ANSI A118 3 A118 6 A118 7 A118 8 Setting and Grouting Specifications tile ANSI A108 5 grout ANSI 108 6 A108 9 A108 10 heating system follow manufacturer s directions Other Considerations if gypsum concrete is used follow gypsum manufacturer s recommendations regarding primers and or special surface preparation before installing DITRA and DITRA XL vapor barrier on crawl space floors according to regional building codes where a waterproof floor is required all DITRA and DITRA XL seams and floor wall transitions must be sealed with Schluter KERDI BAND using unmodified thin set mortar see page 14 certain moisture sensitive stones e g green marble or resin backed tiles may require special setting materials Consult stone supplier and Schluter Systems for more information Concrete Substrate Structural concrete slab Areas of Application over structurally sound and even radiant heated concrete floors young concrete concrete
21. substrates and underlayments KERDI BAND floor wall connections are just as easily concealed with wood base as with tile KERDI BAND floor wall connections in dishwasher alcoves are parged with thin set mortar see page 14 vapor barrier on crawl space floors according to regional building codes certain moisture sensitive stones e g green marble or resin backed tiles may require special setting materials Consult stone supplier and Schluter Systems for more information Floors Interior Structural Plank Subfloor Areas of Application over structural plank subfloors interior dry or wet areas Limitations minimum 2 x 2 50 mm x 50 mm tile Requirements maximum spacing of joists is 24 670 mm o c double layer wood floor consisting of e minimum structural plank subfloor thickness 3 4 19 mm e minimum underlayment thickness 15 32 1 2 mom 19 mm Substrate Preparation verify that subfloor planks are properly fastened to framing members underlayment minimum 15 32 1 2 nom 13 mm thick Exposure 1 plugged face plywood or OSB with 1 8 3 mm gap between sheets see page 21 for underlayment installation guidelines any leveling of the assembly must be done prior to installing DITRA and DITRA XL Movement Joints amp DITRA and DITRA XL do not eliminate the need for movement joints including perimeter joints within the tiled surface Movement joints must be installed in
22. such as veins and fissures Such features can be weaker than the surrounding stone fabric and act as stress risers concentrating bending stresses within the region of discontinuity and 3 When wood floor assemblies are subjected to forces such as loading both live and dead loads they produce flexural stresses in the surface covering which can cause weak and brittle materials to break or crack Engineering mechanics as well as field observations show that the location of maximum flexural stresses in the floor assembly is directly over the floor joists and at seams in the subfloor panels Therefore we recommend double layer wood floors when installing natural stone in order to increase the stiffness of the sheathing assembly and position underlayment seams away from the joists to minimize flexural stresses in the stone covering directly above the joists and at seams Refer to page 21 for underlayment installation guidelines For more information on the development of these guidelines please refer to the article titled Position of Underlayment to Prevent Cracked Tile and Grout on our website at www schluter com 5138 aspx 26 NATURAL STONE Q What distinguishes DITRA XL from DITRA Since the uncoupling function of DITRA is founded on its geometric flexibility to provide a forgiving shear plane increasing the height of the product produces additional protection against stresses being transferred between the tile and supporting substrate
23. the advantages of uncoupling are achieved without sacrificing point load distribution capabilities Because DITRA is uniquely engineered to provide uncoupling vapor management and waterproofing all of which are essential functions in exterior environments it provides a reliable installation system for ceramic and stone tile surface coverings in exterior applications Exterior Concrete Floors Patios and Walkways D EXT C TS 15 Ceramic or stone tile Unmodified thin set mortar DITRA or DITRA XL uncoupling membrane Unmodified thin set mortar Concrete Concrete subfloor Areas of Application over structurally sound and even exterior concrete on grade where positive drainage below slab is provided young concrete concrete cured less than 28 days post tensioned or pre stressed concrete cracked concrete Limitations minimum 2 x 2 50 mm x 50 mm tile for wood or concrete balconies and terraces see detail D EXT OS page 16 Please contact Schluter Systems with any questions any cracks in concrete subfloor must exhibit in plane movement only thin set tile assemblies including those incorporating DITRA or DITRA XL cannot accommodate differential vertical displacement Requirements Slab to be structurally sound slab assembly must be sloped for complete surface drainage gravel bed or other means of drainage must be provided below slab Slab to be free of waxy or oily films and
24. we recognized that increasing the thickness of DITRA would result in increased movement accommodation When the new product was tested it became clear that the increase was significant Specimens including porcelain tile set on DITRA XL over single layer 3 4 19 mm thick plywood subfloors with joists spaced at 24 610 mm o c were tested according to the ASTM C627 Standard Test Method for Evaluating Ceramic Floor Tile Installation Systems Using the Robinson Type Floor Tester The two assemblies produced ratings of Heavy and Extra Heavy per the TCNA Handbook for Ceramic Glass and Stone Tile Installation Test results are summarized in the table below TCNA Test Joist Spacing Tile ASTM C627 Test Rating Report Number 12 x 12 porcelain d 5 16 nominal thickness Heavy 12 cycles TCNA 303 06 6 x 6 porcelain i 5 16 nominal thickness Extra Heavy 14 cycles 153 09 Test Setup 1 2 x 2 joists 2 APA rated Exposure 1 tongue and groove plywood subfloor 23 32 3 4 nom thickness Latex portland cement mortar ANSI A118 11 DITRA XL Unmodified thin set mortar ANSI A118 1 Tile Polymer modified cement grout ANSI A118 7 RT E pa DITRA DITRA XL C dA PRODUCT SELECTION Choosing between Schluter DITRA and DITRA XL 5 All wood materials including OSB plywood and framing members are subject to expansion contraction bend
25. AIMS ON THIS LIMITED WARRANTY To make a claim under this Limited Warranty the Owner must provide Schluter Systems with written notice within 30 days of any alleged defect in the Products covered by this Limited Warranty together with date and proof of purchase of the Products proof of the costs of the original installation and name and address of all installers failing which this Limited Warranty shall be of no legal effect Schluter Systems reserves the right at its election and as a condition of this Limited Warranty to inspect the alleged failed and defective condition All U S Claims shall be sent to All Canadian Claims shall be sent to Schluter Systems L P Schluter Systems Canada Inc Attn Warranty Claims Dept Attn Warranty Claims Dept 194 Pleasant Ridge Road 21100 chemin Ste Marie Plattsburgh NY 12901 5841 Ste Anne de Bellevue QC H9X 3Y8 Forthe purpose ofthis warranty Schluter Systems L P shall providethe warranty for all products for end users located inthe United States and Schluter Systems Canada Inc shall provide the warranty for all products for end users located in Canada This warranty is limited to sales of the Products made in and intended for use in the United States and Canada WARRANTY 33 Schluter Systems Schluter Systems L P 194 Pleasant Ridge Road Plattsburgh NY 12901 5841 Tel 800 472 4588 Fax 800 477 9783 Schluter Systems Canada Inc 21100 chemin Ste Marie Ste Anne de Bellevu
26. BA PLUS Drainage mat for sustained water drainage 4 Mortar bed Wire reinforced mortar bed minimum thickness 1 1 2 38 mm 5 Edge insulation strip compressible foam 6 Schluter DITRA or Schluter DITRA XL Install DITRA and DITRA XL on mortar bed using unmodified thin set mortar 7 Schluter BARA RTK Edging profile with drip lip and support for the BARIN gutter system Please also see Schluter Systems Illustrated Price List and visit www schluter com for more detailed information on BARA balcony edging profiles 8 Schluter BARA RK T shaped finishing profile 9 Schluter KERDI BAND Polyethylene seaming tape used to seal DITRA and DITRA XL seams and floor wall connections with unmodified thin set mortar see page 22 10 Schluter DILEX EKE Corner movement profile for floor wall connections 11 Schluter RONDEC or JOLLY Edging profiles provide a clean finish for base tiles Available in many different colors and finishes Material stainless steel or color coated aluminum 12 Schluter BARIN Gutter system made of color coated aluminum for water management at the perimeter of balconies and terraces Also available a complete line of system accessories Please also see Schluter Systems llustrated Price List and visit www schluter com for more detailed information on the BARIN gutter system 13 Ceramic or stone tile Install surface covering using unmodified thin set mortar Note Movement j
27. Schluter Systems PROFILE OF INNOVATION AF 2 2 4A AAD LAL 4I SAA A A AA 4 4 AA A AA X CSF A OA AM SA lt A AAA A L L4 L4 L Ae sh 4 4 L n n 4 CAF 2 AA A A A 4 4 4 FAA A 4I ZNZ n n n 4 1 L4 L L 7 ZNZ SOJ AA AA ZOL LNL AAA 4 4 4 Ko L LA FAA LA 4 n 4 n 4 ELANLA 2 2 gt 24 4 n n 4 4 4 C 4A AAA FF VK 4 L4 AA AA AH F gt 2 4 4 n n 4 4 F FAP OA A SA 2 20290 A MA 4 fF AA A FA FA AFF FF 7 AOL LANL Fa Z 2 LL 7 LOL A APS 4 L 4 z The Universal Underlayment for Ceramic and Stone Tile Specifically designed as an underlayment for ceramic and stone tile Ceramic and stone tiles are durable easy to maintain and hygienic representing the ideal surface coverings However today s lightweight construction methods can make the installation of hard surface coverings particularly challenging In order to protect the integrity of the tile assembly an underlayment that performs multiple functions Is required Schluter DITRA is specifically designed to allow the installation of ceramic and stone tile over any even and load bearing substrate The integration of DITRA s uncoupling waterproofing load distribution and vapor management functions makes consistent results viable Uncoupling Tile has been successfully installed for thousands of years by
28. TRA or DITRA XL materials non reusable flooring surfaces and the appropriate setting and grouting materials Further due to conditions beyond the control of Schluter Systems e g color and shade availability discontinuation normal wear and tear Schluter Systems cannot guarantee or warrant an exact match to the specific tile stone or other flooring materials used in the installation In such events substantially similar materials may be substituted DISCLAIMER THERE ARE NO WARRANTIES BEYOND THIS EXPRESSED WARRANTY AS STATED ABOVE ALL OTHER WARRANTIES HEPRESENTATIONS OR CONDITIONS EXPRESSED OR IMPLIED ARE DISCLAIMED AND EXCLUDED INCLUDING WARRANTIES REPRESENTATIONS OR CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARISING BY STATUTE OR OTHERWISE BY LAW OR FROM A COURSE OF DEALING OR USAGE OF TRADE SCHLUTER SYSTEMS EXCLUDES AND IN NO EVENT SHALL HAVE ANY LIABILITY FOR LOST PROFITS OR ANY OTHER INDIRECT SPECIAL INCIDENTAL PUNITIVE EXEMPLARY OR CONSEQUENTIAL DAMAGES ARISING OUT OF OR OTHERWISE CONNECTED TO FAILURE OF THE PRODUCTS OR FLOORING SYSTEM OF WHICH THEY ARE PART NOR MISUSE OF THE PRODUCTS OR FLOORING SYSTEM REGARDLESS OF ANY STRICT LIABILITY ACTIVE OR PASSIVE NEGLIGENCE OF SCHLUTER SYSTEMS AND REGARDLESS OF THE LEGAL THEORY CONTRACT OR TORT OR EXTRA CONTRACTUAL OR OTHER NOR FROM ACTS OF WAR TERRORISM FAULTY AND NEGLIGENT PENETRATION OF THE SYSTEM FIRES EXPLOSIONS ACTS OF GOD INTENTIONAL ACTS OF DES
29. TRUCTION OR ANY LOSSES DUE TO STRUCTURAL FAILURE OR OTHER CAUSES UNRELATED TO THE PRODUCTS OR DELAYS OR ANY OTHER INCIDENTAL OR CONSEQUENTIAL DAMAGES THIS WARRANTY IS GIVEN IN LIEU OF ANY OTHER WARRANTY EXPRESSED OR IMPLIED THE REMEDIES CONTAINED HEREIN ARE THE ONLY REMEDIES AVAILABLE FOR BREACH OF THIS WARRANTY THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS SOME STATES AND PROVINCES DO NOT ALLOW DISCLAIMERS OR OTHER RESTRICTIONS OF IMPLIED WARRANTIES SO SOME OF THE ABOVE DISCLAIMERS MAY NOT APPLY TO YOU TRANSFERABILITY This Limited Warranty extends ONLY to the original end user defined as original intended owner and user of the property unit in which the installation is incorporated herein referred to as Owner and is not transferable or assignable unless approved in writing by the Technical Director or an Officer of Schluter Systems or otherwise prohibited by specific state or provincial law MODIFICATIONS TO WARRANTY No changes or modification of any terms or conditions of this warranty are allowed unless authorized by written agreement and signed by the Technical Director or an Officer of Schluter Systems EFFECTIVE DATE This warranty shall supersede and replace any and all prior oral or written warranties agreements or other such representations made by or on behalf of Schluter Systems relative to the Products or the application of the Products and shall apply to any installation occurring on or after January 1 2013 CL
30. aced at 24 670 mm o c 5 16 7 mm thick creates an even transition between typical 5 16 7 mm thick tile and 3 4 19 mm thick hardwood flooring 4 PRODUCT SELECTION Choosing between Schluter DITRA and DITRA XL Even Transitions to Hardwood Flooring In many thin set ceramic tile applications one of the goals is to minimize the thickness of the assembly to reduce height transitions from the tile to other floor coverings such as carpet engineered wood or vinyl At 1 8 3 mm thick DITRA accomplishes this goal while providing the four essential functions for successful tile installations Schluter floor profiles finish and protect tile edges at these transitions to complete the installation However where ceramic tile meets 3 4 19 mm thick hardwood minimizing the thickness of the tile assembly can result in a height transition up to the hardwood On various projects our customers began using two layers of DITRA to solve this problem From a technical perspective this was a sound approach because DITRA is configured to provide load distribution and is virtually incompressible within the tile assembly These customers felt that using two layers of DITRA was reasonable on relatively small applications as the benefit outweighed the additional labor in their perspective However they requested a better solution Research and Development Since the uncoupling function is based on the geometric configuration of the product
31. al surface coverings for the exterior and have been used successfully for thousands of years Exterior balconies and terraces are ideal opportunities for the installation of tiled surfaces However these installations have typically presented significant challenges to tile setters Since hard surface coverings are rigid by nature and have different physical properties compared to virtually every substrate they cannot be bonded directly to the substrate particularly in exterior applications where they are exposed to potentially severe climatic changes and the recurring introduction of moisture Schluter DITRA s uncoupling function protects the ceramic or stone tile covering by neutralizing the differential movement stresses between the substrate and the tile thus eliminating the major cause of cracking and delaminating of the tiled surface This is particularly important since these stresses are magnified by the significant temperature gradients common to exterior applications DITRA provides effective waterproofing that will protect the tile assembly from the recurring introduction of water which is common in exterior applications bed The free space beneath the DITRA matting provides a route for any residual moisture in the substrate to escape This is especially important when installing tile over a young slab concrete slabs subject to moisture migration or a fresh mortar oince DITRA is virtually incompressible within the tile assembly
32. amp Schluter DITRA XL 10 Year Limited Warranty COVERAGE AND CONDITIONS Subject to the conditions and limitations as stated hereinafter Schluter Systems warrants that Schluter DITRA or Schluter DITRA XL Products will meet all composition and performance criteria for a period of ten 10 years from the date of purchase only when the Products are used and installed in accordance with the terms and conditions of the Schluter DITRA Installation Handbook and industry standard guidelines that are not in conflict with the Handbook in effect at the time of installation Further efflorescence 15 considered to be a natural occurrence with cementitious materials and is therefore not considered 10 be a defective condition and is not covered by this warranty It is the responsibility of the owner builder installer to ensure the suitability of all building materials and all associated building materials for the owner s intended use It is recommended that the owner consult with an experienced and professional installer RESOLUTION f the Products fail to meet this warranty then the owner s exclusive remedy and the sole obligation of Schluter Systems at its election shall be to a reinstall or replace the failed portion of the floor covering assembly b pay an amount not to exceed the original square foot cost of the installation of the floor covering assembly verified to be defective Floor covering assembly is defined to include all DI
33. ance is dependent upon both the floor ceiling structure and the floor covering itself In general impact sound control with hard surface coverings is best achieved with floating systems that incorporate resilient layers A 6 152 mm thick concrete slab will produce an IIC rating of approximately 28 without the floor covering or ceiling assembly The direct application of tile will not significantly improve the IIC rating When flexible underlayments membranes are used in a thin set assembly the IIC rating can be improved though the use of additional sound attenuation methods e g sound rated ceilings are typically necessary to meet required minimums As resilient layers within a thin set assembly are made thicker and more flexible sound control tends to improve but load bearing capacity is reduced This is the inherent limitation of thin set assemblies for sound control However relatively thick and resilient sound underlayments can be combined with a load distribution layer e g mortar bed lightweight concrete topping poured gypsum underlayment to provide excellent results sound control meeting code minimums without a sound rated ceiling and still provide good support for the tile assembly For example research has shown that a 1 3 8 85 mm thick concrete topping over 1 25 mm thick mineral fiber board on a 6 152 mm thick concrete slab will produce an average IIC rating of approximately 60 to 65 without the floor covering or ceiling ass
34. areas kitchens and bathrooms Given that the test assemblies consisted of only a single layer of plywood over joists spaced at 19 2 o c a bending and deflecting substrate these ratings demonstrate that DITRA performs extremely well under load while at the same time providing flexibility within the shear plane DITRA provides uncoupling geometric flexibility through its open rib structure which allows for in plane movement that effectively neutralizes the differential movement stresses between the substrate and the tile When placed on a solid foundation columns or pillars can support tremendous loads The same physical principle applies to DITRA installations Column like mortar structures are formed in the cutback cavities of the matting Loads are transferred from the tile covering through these column like mortar structures to the substrate Since mortar has a very high compressive strength DITRA becomes virtually incompressible within the tile assembly and therefore doesn t sacrifice load distribution capabilities of the system This flexibility is readily apparent when the overall DITRA assembly is subjected to shear testing In the tests shown below porcelain tile was bonded to concrete using unmodified thin set mortar meeting ANSI A118 1 One specimen included DITRA while the other did not The results show that the amount of stress developed in the system when the tile layer is displaced is significantly reduced through the incl
35. at the same time providing flexibility within the shear plane Waterproofing DITRA and DITRA XL provide reliable waterproofing in interior and exterior applications The products have been found to meet or exceed the requirements of the American National Standard Specifications for Load Bearing Bonded Waterproof Membranes for Thin set Ceramic Tile and Dimension Stone Installation A118 10 Schluter DITRA and DITRA XL are also listed by cUPC and have been evaluated by ICC ES Report ESR 2467 Vapor Management The free space under the DITRA matting allows the substrate to breathe while the material composition provides for a very low water vapor permeance which prevents any significant vapor intrusion in the tile assembly from below Property Test Method Performance Water vapor permeance ASTM E96 00 water method at 73 F and 50 RH 0 006 perms The result is that DITRA and DITRA XL effectively manage vapor and prevent damage to the tile covering as a result Green Building DITRA has been independently tested to determine VOC emissions per California Specification 01350 Standard Practice for the Testing of Volatile Organic Emissions from Various Sources Using Small Scale Environmental Chambers Property Test Method Performance VOC emissions CA 01350 and ASTM D5116 0 0 mg me Thus DITRA has been found to emit zero VOCs and can contribute towards achieving the following green build
36. atory and field measurement of impact sound transmission respectively The results from these tests are then used to calculate a single number rating per ASTM E989 that is called impact insulation class or field impact insulation class FIIC The ASTM E2179 test method was developed to provide a means of evaluating the flooring assembly s contribution to a concrete floor The contribution of the flooring assembly to the IIC of the slab is calculated and reported as the AIIC delta IIC Building codes typically contain requirements for both STC and IIC For example the International Building Code IBC calls out minimum values of 50 for STC and IIC or 45 for FSTC and FIIC as an alternative to laboratory testing The International Residential Code IRC calls out minimum values of 45 for STC and IIC Condominium associations may have their own minimum requirements for sound attenuation as well Factors affecting performance Airborne sound transmission through floor ceiling assemblies can be reduced effectively by increasing the mass of the assembly and introducing suspended ceilings with sound insulation in the cavities In general STC ratings are largely independent of the choice of floor covering Furthermore the methods used to improve STC ratings as called out above do not have adverse effects on the floor covering Thus airborne sound transmission control is not a challenge to be addressed by the tile industry Impact sound control perform
37. d ceramic tile were tested over 6 152 mm thick concrete slab and the measured IIC rating of this assembly was 10 points greater than the measured IIC rating of the bare slab IIC bare slab 28 IIC slab w DITRA and tile 38 This level of performance is not sufficient to meet typical code requirements without additional sound control measures As discussed above the use of a sound control underlayment in combination with a load distribution layer such as a mortar bed lightweight concrete or gypsum concrete can significantly improve the IIC rating of the assembly Sound rated ceilings can improve the IIC rating as well Please note that this testing was performed prior to the approval of the ASTM E2179 standard test method and used a smaller specimen size 4 ft x 4 ft than required by existing sound control test method standards Installation Considerations In laboratory testing sound energy transmission is effectively directed through the test specimen only with negligible transfer through other paths In other words the values recorded provide an accurate picture of the sound control characteristics of the test specimen itself However in construction floor ceiling assemblies and wall assemblies are connected to form the final structure and there is potential for interaction between these elements Floor ceiling assemblies may not perform as expected in the field with respect to both airborne and impact sound control if they are not is
38. d to Concrete ANSI A118 4 Tile and DITRA Bonded to Concrete ANSI A118 10 Manufacturer 1 Specimens 66 61 70 62 Unmodified A118 1 ave Average 65 Manufacturer 1 Liquid Emulsion 199 Specimens 99 57 58 75 atex modified A118 4 Average 61 Allspecimens subjected to freeze thaw cycles in accordance with ANSI A118 4 F5 2 6 ANSI A118 4 requires minimum shear bond strength of 175 psi ANSI A118 10 requires minimum shear bond strength of 50 psi 24 TESTING TESTING amp CERTIFICATIONS Product Evaluation Schluter Systems is committed to providing reliable installation systems for ceramic and stone tile As part of this commitment we have invested considerable resources in testing our products and obtaining certifications where applicable to provide our customers and local code officials with relevant data that supports the efficacy of our systems All the testing referenced below was performed by independent laboratories Uncoupling and Support Load Distribution The method used to establish the overall performance of a tile assembly under loading is the ASTM C627 Standard Test Method for Evaluating Ceramic Floor Tile Installation Systems Using the Robinson Type Floor Tester The assembly is tested in cycles using a loaded revolving carriage Load wheel hardness and number of revolutions vary with each cycle Once a specified level of damage is exceeded the test is stopped The Tile Council of Nort
39. e QC H9X 3Y8 Tel 800 667 8746 Fax 877 667 2410 www schliuter com 2015 Schluter Systems L P 01 2015 552378
40. e page 14 ceramic or porcelain tile can be installed over single layer wood subfloors on joists spaced at 24 610 mm o c when using DITRA XL see detail D W24 XL T on page 8 WOOD Floors Interior Ceramic or Porcelain Tile 7 D W24 XL T 15 Ceramic or porcelain tile Unmodified thin set mortar DITRA XL uncoupling membrane Latex p c mortar Single layer of plywood or OSB I joists or trusses D W S 15 Natural stone tile Unmodified thin set mortar DITRA or DITRA XL uncoupling membrane Latex p c mortar Double layer of plywood or OSB Joists I joists or trusses 8 WOOD Floors Interior 24 610 mm joist Spacing single layer OSB or plywood subfloor Areas of Application over even and structurally sound OSB or plywood subfloor with 24 670 mm o c joist spacing interior dry or wet areas Limitations minimum 2 x 2 50 mm x 50 mm tile for natural stone see detail D W S page 8 and natural stone discussion page 26 Requirements maximum spacing of I joists or floor trusses is 24 610 mm o c minimum subfloor thickness 23 32 3 4 nom 79 mm tongue and groove with 1 8 3 mm gap between sheets Substrate Preparation verify that subfloor panels are properly fastened to framing members any leveling of the subfloor must be done prior to installing DITRA XL Movement Joints DITRA XL does not eliminate the need for movement
41. eavy 13 cycles TCA 073 03 eres ms Manufacturer 2 Specimens 425 381 275 377 Unmodified A118 1 126 03 Light 9 cycles TCA 186 03 necem m Test Setup 2 x 2 joists spaced 19 2 o c APA rated Exposure 1 tongue and groove plywood subfloor 3 4 thickness Spray dried latex modified mortar in Test TCA 046 09 and liquid emulsion latex modified mortar in Test TCA 126 03 ANSI A118 4 Schluter DITRA mat Unmodified mortar as indicated in table above ANSI A118 1 12 x 12 porcelain tile 3 8 nominal thickness Sanded spray dried latex modified portland cement grout ANSI A1189 7 NOOR T Tile samples removed from ASTM C627 test specimens evaluated for shear bond strength between mortar tile Tests were also performed on DITRA assemblies using unmodified thin set mortar over concrete according to ASTM C627 The two assemblies produced ratings of Extra Heavy indicating a performance level acceptable for extra heavy and high impact use in food plants dairies breweries and kitchens and Light indicating a performance level suitable for light commercial use in office space reception areas kitchens and bathrooms Variation in the performance levels achieved is attributable to the different tile used Test results are summarized in the table below Mortar Type Applicable Grout Applicable Substrate ANSI Standard Tile ANSI Standard ASTM C627 Test Rat
42. ed to heavy vehicular traffic provided the type format and thickness of the tile is appropriate for the application By addressing all of the challenges associated with today s fast construction methods DITRA provides a durable installation system for ceramic and stone tile over concrete substrates D C TS 15 Ceramic or stone tile Unmodified thin set mortar DITRA or DITRA XL uncoupling membrane Unmodified thin set mortar Concrete Floors Interior Ceramic Stone Tile Concrete subfloor Areas of Application over any structurally sound and even concrete subfloor amp young concrete concrete cured less than 28 days or below grade concrete subject to moisture migration post tensioned or pre stressed concrete cracked concrete Limitations minimum 2 x 2 50 mm x 50 mm tile concrete slabs subject to moisture migration must have all seams in DITRA and DITRA XL sealed with Schluter KERDI BAND using unmodified thin set mortar any cracks in concrete subfloor must exhibit in plane movement only thin set tile assemblies including those incorporating DITRA or DITRA XL cannot accommodate differential vertical displacement Requirements Slab to be structurally sound Slab to be free of waxy or oily films and curing compounds when present mechanical scarifying is necessary the installation of DITRA or DITRA XL and tile can begin as soon as the slab can be walked upo
43. embly which far exceeds code minimums Wood frame construction typically consists of a plywood or OSB subfloor supported on joists with gypsum board used to finish the ceiling underneath The first step in improving impact sound control is to ensure that the gypsum board ceiling is not directly attached to the joists Resilient channels are used to provide isolation between the gypsum board and the joists Sound insulation batts are placed in the cavities between joists as well This type of assembly will produce an IIC rating of approximately 45 before the flooring assembly is installed This rating can be improved by increasing the mass of the assembly e g adding another layer of gypsum board to the ceiling or plywood OSB to the floor The direct application of tile over the subfloor can actually lower the IIC rating of this assembly Using flexible underlayments may mitigate this effect or even improve the IIC rating but currently there is no standard test method available to quantify the contribution of a flooring assembly to wood frame construction in general Again the use of relatively thick and resilient sound underlayments can be combined with a load distribution layer to provide significant sound control and a solid base for tile installation Schluter DITRA Schluter Systems has never promoted DITRA as a sound control system However DITRA provides a degree of sound attenuation similar to various thin set sound control membranes DITRA an
44. fing inside and outside corners Schluter KERDI KERECK F Waterproofing for corners Item No Thickness Packaging KERECK FI 2 4 mil 2 Inside corners KERECK FI 10 4 mil 10 Inside corners KERECK FA 2 4 mil 2 Outside corners KEHECK FA 10 4 mil 10 Outside corners Waterproofing for 135 corners KERECK1935 FI2 2 Inside corners 10 Inside corners 4 mil 4 mil KERECK 135 FH0 Note 1 mil 1 one thousanath of an inch KERDI KM prefabricated seal is cut sections of the KERDI waterproofing membrane designed to seal protrusions through the KERDI or DITRA DITRA XL membranes KERDI KM is designed to be used in conjunction with Schluter KERDI FIX or equivalent sealant to seal around pipes or other similar elements Schluter KERDI KM Pipe seal Item No Dimensions Thickness Packaging KM 5117 22 4 mil 5 units Hole diameter 7 8 22 mm Note 1 mil 1 one thousanath of an inch Schluter DITRA TROWEL and Schluter KERDI TROWEL Used to install DITRA and KERDI membranes The DITRA TROWEL features an 11 64 x 11 64 4 5 mm x 4 5 mm square notched design while the KERDI TROWEL features a 1 8 x 1 8 3 mm x 3 mm square notched design Schluter DITRA TROWEL and Schluter KERDI TROWEL Trowels used to install DITRA and KERDI membranes Item No Notch Size Packaging TRL DIT6 RU 6 units TRL KER6 1 8
45. h America Handbook for Ceramic Glass and Stone Tile Installation assigns performance levels to an assembly based on the number of cycles successfully completed The ratings include residential light moderate heavy and extra heavy in order of improving performance Report Number Substrate Joist Spacing Tile Rating Schluter DITRA 046 03 B Plywood 19 2 o c 12 x 12 porcelain Heavy 13 cycles 126 03 Plywood 19 2 12 x 12 porcelain Light 9 cycles 130 04 C OSB 19 2 o c 6 x 6 porcelain Heavy 12 cycles TCA 130 04 A OSB 19 2 o c 3 x 3 porcelain Light 7 cycles TCNA 039 06 Concrete N A 12 x 12 porcelain Extra Heavy 14 cycles TCNA 057 06 Concrete N A 2 x 2 porcelain Light 6 cycles Schluter DITRA XL TCNA 153 08 Plywood 24 O C 6 x 6 porcelain Extra Heavy 14 cycles TCNA 303 06 Plywood 24 O C 12 x 12 porcelain Heavy 12 cycles Assembly Notes 1 All plywood and OSB subfloors were 23 32 3 4 nom thick 4 bonded to DITRA and DITRA XL with unmodified thin set 2 DITRA and DITRA XL bonded to plywood OSB with modified mortar ANSI A118 1 thin set mortar ANSI A118 11 5 Polymer modified cement grout ANSI A118 7 3 DITRA bonded to concrete with unmodified thin set mortar ANSI A118 1 The test results above demonstrate that Schluter DITRA and DITRA XL perform extremely well under load while
46. ing WOOD UNDERLAYMENT Plywood OSB underlayment installation guidelines DISCUSSION In some applications referenced in this Handbook adding a layer of plywood or OSB before installing Schluter DITRA and the ceramic or stone tile covering is required to reduce deflection and curvature of the sheathing between the joists INSTALLATION GUIDE Place underlayment panels Exposure 1 plugged face plywood or OSB of minimum 3 8 10 mm thickness with long dimension perpendicular to floor joists such that the following conditions are met 1 Abut all underlayment end joints at quarter points between joists Example Abut underlayment panels on either side of the joist centerline at 4 102 mm for 16 406 mm o c joists 5 127 mm for 19 2 488 mm o c joists 6 152 mm for 24 610 mm o c joists see figures 1 amp 2 Note Underlayment end joints should be placed as far away from subfloor end joints as possible 2 Underlayment to overlap edge joints of subfloor by 1 2 of the width of the subfloor panel 24 610 mm At restraining surfaces overlap may be less than 24 610 mm when the subfloor panel is less than 48 1 2 m wide see figure 1 3 Gap underlayment panels 1 8 3 mm on all ends and edges and 1 4 6 mm at perimeter walls cabinetry or other restraining surfaces Figures 1 amp 2 Typical Subfloor Underlayment Detail Not to Scale Legend Figure 1 Figure 2 E Subfloor
47. ing Test Report Number 12 x 12 porcelain Polymer Modified Concrete Unmodified A118 1 aH onormal thickhess Cement Grout A118 7 Extra Heavy 14 cycles TCNA 039 06 2 x 2 porcelain Polymer Modified Concrete Unmodified A118 1 ia nomina the cese Cement Grout A118 7 Light 6 cycles TCNA 057 06 Given concern over freeze thaw performance of unmodified mortar the next set of tests included shear bond tests of porcelain tile bonded to concrete with and without DITRA after exposure to freeze thaw cycles in accordance with ANSI A118 4 F5 2 6 An unmodified mortar was used in one installation while liquid emulsion latex modified mortar from the same manufacturer was used in the other It should be noted that when used between two impervious materials such as porcelain tile and DITRA latex modified mortars must be afforded extended drying times According to the TCNA Handbook for Ceramic Glass and Stone Tile Installation the necessary drying period can fluctuate from 14 days to over 60 days when using latex modified mortar Since unmodified mortars do not require a drying period and actually benefit from continued water presence they allow for normal use of the tile installation in a fraction of the time and as shown in the test data in the table below provide more than adequate performance Mortar Type Shear Test Results psi Test Report TCA 145 03 Applicable ANSI Standard Tile Bonde
48. ing and deflection as a result of changes in moisture content and loading Further these deformations fluctuate over the life of the building structure Schluter DITRA s uncoupling function protects the ceramic or stone tile covering from the aforementioned deformations by neutralizing the differential movement stresses between the wood structure and the tile thus eliminating the major cause of cracking and delaminating of the tiled surface Therefore DITRA can replace a second layer of plywood in most applications Since wood structures are sensitive to moisture DITRA s waterproofing function adds an essential element to the flooring assembly by providing simple effective and permanent moisture protection Wood continually absorbs and releases moisture The free space beneath the DITRA membrane allows the wood to breathe and provides a route for any residual moisture in the wood substrate to escape Since DITRA is virtually incompressible within the tile assembly the advantages of uncoupling are achieved without sacrificing point load distribution capabilities By addressing all of the challenges associated with today s fast lightweight construction methods DITRA provides a durable installation system for ceramic and stone tile over wood substrates D W16 T 15 Ceramic or porcelain tile Unmodified thin set mortar DITRA or DITRA XL uncoupling membrane Latex p c mortar Single layer of plywood or OSB Joists I j
49. ing credits e LEED IEQ Credit 4 3 Low Emitting Materials Flooring Systems ICC 700 2008 901 6 Pollutant Source Control Hard Surface Flooring CHPS EQ2 2 Low Emitting Materials TESTING amp CERTIFICATIONS 5 NATURAL STONE Discussion of natural stone single layer wood subfloors Natural stone is a product of nature with a wide variety of colors patterns and textures that come together to distinguish it as one of the premiere surface coverings available on the market Some of stone s characteristics which add to its beauty and uniqueness are veins fissures starts and dry seams While these characteristics enhance its aesthetic appeal they re also indicators that point to the inherent variability of the flexural strength of natural stone which can have detrimental effects on serviceability This variability is underscored by examining the range of typical flexural bending strengths of ceramic tile compared to the range of strength for some common natural stones Schluter Systems contracted the Tile Council of North America TCNA to perform flexural strength testing on various commercially available ceramic tiles and dimension stones guided by the ASTM C880 Standard Test Method for Flexural Strength of Dimension Stone Five samples of each tile and stone were tested with the minimum recorded values displayed in the figure below We have chosen to show only minimum values since these represent the weakest samples
50. ints are designed to induce controlled cracking caused by drying and chemical shrinkage at preselected locations They are typically formed by saw cutting tooling or through the use of inserts DITRA and DITRA XL are not separated at control contraction joints however surface movement joints must be provided in the tile covering in accordance with the aforementioned guidelines See also Surface Joints Structural or Seismic Joints Regarding structural and seismic expansion joints please contact Schluter Systems at 1 800 472 4588 USA or 1 800 667 8746 Canada for proper installation guidelines MOVEMENT JOINTS 9 Note regarding residential applications Due to the increased popularity of continuous tile installations i e tile continuing from room to room on a given floor movement joints have become both increasingly important and increasingly difficult to provide For instance consider the residential installation shown in Figure 5 It is almost certain that the homeowner will resist the idea of placing movement joints across any of the rooms shown in the figure despite TCNA TTMAC and Schluter Systems guidelines However the need for movement joints in this installation is undeniable given the extended size of the field The question then becomes How does one provide the movement joints necessary to ensure a durable installation without compromising the aesthetic qualities of the continuous tile field The easiest way t
51. ints between subfloor panel ends as would be present in an actual floor construction Subfloor butt joints are located in areas of maximum bending flexural stress on the joists Q Then why doesn t Schluter Systems warranty DITRA XL for stone applications over single layer wood subfloors A Schluter Systems acknowledges that in many instances the market is requesting stone applications over single layer wood subfloors This is due in large part because customers want even transitions to adjacent flooring surfaces and don t want the additional cost of installing another layer of wood Schluter Systems has responded to this request with DITRA XL In our opinion based on laboratory testing and field experience DITRA XL is the most reliable system for installing natural stone over single layer wood subfloors on the market today Still the inherent variability in the flexural strength of natural stone in conjunction with the dynamics of single layer wood subfloors can produce substantial uncertainty in predicting the in service performance of the stone covering As such Schluter Systems cannot warranty stone coverings over single layer wood subfloors When the risks associated with natural stone and a single layer wood application are unacceptable to the owner building design professional general contractor and or installer then detail D W S is recommended which includes the use of a plywood OSB underlayment double layer wood system in add
52. ion a Exterior 8 12 2 4 m 3 7 in each direction Place around the perimeter of any size floor and or against all restraining surfaces a Fields should be as square as possible The ratio between length and width should not exceed 1 1 5 luter DILEX EKE 3 PERIMETER EXPANSION JOINT I A INCH EXPANSION JOINT CONSTRUCTED WITH SILL Se Whe ETT N MORTAR DRYWALL 4 Schluter DILEX BWS Typical movement joint applications Perimeter Joints Perimeter joints are provided at the outer edges of any tile installation to accommodate movements attributable to changes in moisture temperature and loading See figures 1 2 and 3 If Schluter DILEX corner movement profiles will not be used Schluter Systems recommends the use of sill seal a compressible polyethylene gasket used to seal the gap between foundations and sill plates as a quality control measure when providing perimeter movement joints The sill seal band is placed against perimeter structures before any component of the tile assembly is installed e 9 Schluter DITRA Schluter DITRA XL additional underlayments including self leveling materials mortar beds etc oee figures 2 and 3 After the tile is installed and grouted any excess sill seal material is cut away leaving a movement joint with uniform width that is void of any mortar grout or other restraining materia
53. ition to the DITRA or DITRA XL uncoupling membrane Double layer wood systems using DITRA or DITRA XL for supporting stone are covered by the DITRA DITRA XL warranty see page 33 NATURAL STONE 27 Discussion of sound control conjunction with ceramic amp stone Controlling sound transmission through floor ceiling assemblies in multi story construction can present challenges to architects and design professionals particularly when hard surface coverings including ceramic and stone tiles are used This is because sound control materials tend to be compressible and may not provide adequate support for the tile layer in thin set applications However there are practical methods that allow for the use of tile and stone while providing sound transmission control Sound transmission categories evaluation and code requirements The first category is airborne sound such as speaking music etc Airborne sound transmission is measured using standard test methods For example the ASTM E90 and ASTM E336 test methods are commonly used for laboratory and field measurement of airborne sound transmission respectively The results from these tests are then used to calculate a single number rating per ASTM E413 that is called sound transmission class STC or field sound transmission class FSTC The second category is impact sound such as foot traffic dropped items etc The ASTM E492 and ASTM E1007 test methods are commonly used for labor
54. joints including perimeter joints within the tiled surface Movement joints must be installed in accordance with industry standards and norms see page 18 of this Handbook TCNA EJ171 and TTMAC 301 Setting and Grouting Materials latex portland cement p c mortar ANSI A118 11 unmodified thin set mortar ANSI A118 1 grout ANSI A118 3 A118 6 A118 7 A118 8 Setting and Grouting Specifications tile ANSI A108 5 grout ANSI 108 6 A108 9 A108 10 Other Considerations tightly butted and or tented plywood or OSB seams must be addressed prior to installing DITRA XL vapor barrier on crawl space floors according to regional building codes a where a waterproof floor is required all DITRA XL seams and floor wall transitions must be sealed with Schluter KERDI BAND using unmodified thin set mortar see page 14 Floors Interior Natural Stone Tile Double layer of OSB or Plywood subfloor Areas of Application over any even and structurally sound double layer OSB or plywood floor interior dry wet areas Limitations requires double layer wood floor regardless of joist spacing minimum 2 x 2 50 mm x 50 mm tile Requirements maximum spacing of joists I joists or floor trusses is 24 610 mm o c double layer wood floor consisting of e minimum subfloor thickness 23 32 3 4 nom 19 mm tongue and groove e minimum underlayment thickness 11 32 3
55. le Installation Systems Using the Robinson Type Floor Tester The assembly is tested in cycles using a loaded revolving carriage Load wheel hardness and number of revolutions vary with each cycle Once a specified level of damage is exceeded the test is stopped The Tile Council of North America TCNA Handbook for Ceramic Glass and Stone Tile Installation assigns performance levels to an assembly based on the number of cycles successfully completed The ratings include residential light moderate heavy and extra heavy in order of improving performance The TCNA conducted the tests shown below which included a single layer of plywood 3 4 thick over joists spaced at 19 2 DITRA bonded using modified thin set mortar ANSI 118 4 12 x 12 porcelain tile 3 8 thick bonded using unmodified thin set mortar ANSI A118 1 and modified portland cement grout ANSI A118 7 Test Report Number Number of Cycles Passed Rating 046 03 B 13 Heavy TCA 126 03 A 9 Light The two installations produced ratings of heavy and light according to the TCNA Handbook for Ceramic Glass and Stone Tile Installation Heavy indicates a performance level acceptable for shopping malls stores commercial kitchens work areas laboratories auto showrooms and service areas shipping receiving and exterior decks while light indicates a performance level acceptable for light commercial use in office space reception
56. ling are achieved without sacrificing point load distribution capabilities The ability of DITRA installations to support and distribute heavy loads while preserving the integrity of the tiled surface has been verified through extensive laboratory and field testing including applications exposed to vehicular traffic Essential Significant Helpful Cover photo courtesy of Patrick Rogers CONTENTS WOOD CONCRETE GYPSUM HEATED FLOORS WATERPROOFING EXTERIOR APPLICATIONS MOVEMENT JOINTS WOOD UNDERLAYMENT INSTALLATION THIN SET FACTS TESTING TESTING amp CERTIFICATIONS NATURAL STONE SOUND CONTROL HOW DOES IT WORK PRODUCT amp ORDERING INFO WARRANTY Choosing between Schluter DITRA and DITRA XL Schluter uncoupling membranes provide the four essential functions for successful tile installation over a wide range of substrates including plywood OSB concrete gypsum heated floors etc The choice between using DITRA or DITRA XL depends on the nature of the particular project or application The following points will help differentiate between the two products DITRA Minimizes tile assembly thickness and reduces transitions to lower surface coverings e g carpet engineered wood and vinyl Only 1 8 8 mm thick provides the thinnest possible assembly without sacrificing performance DITRA XL Allows for ceramic tile application over single layer plywood OSB subfloors on joists sp
57. ls that would render the joint ineffectual Surface Joints Surface joints must be placed within the tiled surface regardless of substrate conditions They provide for stress relief from movements in the tile field due to thermal and moisture expansion contraction and loading See figure 4 Expansion Joints Expansion joints permit both horizontal and vertical differential movements attributable to thermal and moisture expansion contraction by providing a complete separation for the full depth of the slab to allow for free movement between adjoining parts of a structure or abutting surfaces They are typically placed at columns walls and any other restraining surfaces Expansion joints must be continued through the tile covering DITRA and DITRA XL are separated at expansion joints and the joint is continued through the tile covering using DILEX surface movement profiles When DITRA and DITRA XL are used as waterproofing the abutted sections must be covered with Schluter KERDI FLEX or Schluter KERDI BAND Cold Joints Cold construction joints occur where two successive placements of concrete meet True cold joints bond the new concrete to the old and do not allow movement However it takes extra care to accomplish this so they are usually designed to act as expansion or control contraction joints Cold joints are treated in the same manner as expansion joints See above Control Contraction Joints Control contraction jo
58. n Substrate Preparation any leveling or sloping of the slab or assembly must be done prior to installing DITRA and DITRA XL 10 CONCRETE Floors Interior Ceramic or Stone Tile Movement Joints DITRA and DITRA XL do not eliminate the need for movement joints including perimeter joints within the tiled surface Movement joints must be installed in accordance with industry standards and norms see page 18 of this Handbook TCNA EJ171 and TTMAC 301 MJ concrete floors may incorporate various movement joints see page 19 of this Handbook for guidelines on how to treat the different types of joints control contraction joints expansion joints etc Setting and Grouting Materials unmodified thin set mortar ANSI A118 1 grout ANSI A118 3 A118 6 A118 7 A118 8 Setting and Grouting Specifications tile ANSI A108 5 grout ANSI 108 6 A108 9 A108 10 Other Considerations where a waterproof floor is required all DITRA and DITRA XL seams and floor wall transitions must be sealed with Schluter KERDI BAND using unmodified thin set mortar see page 14 certain moisture sensitive stones green marble or resin backed tiles may require special setting materials Consult stone supplier and Schluter Systems for more information GYPSUM Every substrate presents unique challenges Bonding ceramic or stone tiles directly to gypsum concrete substrates is generally considered questi
59. ng moisture sensitive Requirements substrates underlayments KERDI a all seams in DITRA and DITRA XL matting BAND floor wall connections are just as and floor wall transitions must be sealed with easily concealed with wood base as with tile KERDI BAND using unmodified thin set KERDI BAND floor wall connections in mortar Note KERDI BAND must lap DITRA dishwasher alcoves are parged with thin set at seams and at floor wall transitions by a mortar minimum of 2 50 mm in order to maintain in some applications the vertical section of waterproof integrity the floor wall transition will not accept a bond to unmodified thin set mortar Connections to such elements can be achieved using Schluter KERDI FIX or suitable trowel applied waterproofing materials such as those that require atmospheric moisture to cure e g urethane sealant KERDI DRAIN or KERDI LINE may be used to provide drainage in DITRA and DITRA XL applications DITRA DITRA XL is sealed to the fleece laminated KERDI DRAIN bonding flange with a section of KERDI membrane using unmodified thin set mortar KERDI FIX is used to seal the section of KERDI to the stainless steel KERDI DRAIN bonding flange DITRA DITRA XL is sealed to the KERDI waterproofing collar on KERDI LINE using unmodified thin set mortar 14 WATERPROOFING Floors Interior Lees EXTERIOR APPLICATIONS Every substrate presents unique challenges Ceramic and stone tiles are ide
60. nts and floor wall connections with the KERDI and DITRA membranes as well as profile connections with the Schluter BARA balcony edging profile series Schluter KERDI BAND Waterproofing strip Item No Width Length Thickness KEBA 100 125 5M 5 125 mm 16 5 5m 4 mil KEBA 100 125 10M 5 125 mm 33 10m 4 mil KEBA 100 185 5M 7 1 4 185 mm 16 5 5m 4 mil KEBA 100 250 5M 10 250 mm 5 8m 4 mil KEBA 100 125 5 125 mm 98 5 30 m 4 mil KEBA 100 185 7 1 4 185 mm 98 5 30 m 4 mil KEBA 100 250 10 250 mm 98 5 30 m 4 mil Note 1 mil 1 one thousanath of an inch 30 PRODUCT amp ORDERING INFO Schluter KERDI FLEX KERDI FLEX is a flexible polyethylene waterproofing strip used to seal movement joints over DITRA in specialty applications where large movements are expected i e over expansion joints or construction joints Schluter KERDI FLEX Waterproofing strip for use above movement joints Item No Width Length Thickness FLEX 125 5M 5 125 mm OM 12 mil FLEX 250 5M 10 250 mm WG 12 mil FLEX 125 30 5 125 mm 98 5 30 m 12 mil FPEX 250 30 10 250 mm 98 5 30 m 12 mil Schluter KERDI KERECK F Inside Corner Outside Corner Schluter KERDI KM Note 1 mil 1 one thousanath of an inch KERDI KERECK F are preformed seamless corners made of KERDI for waterproo
61. o accomplish this goal is to begin by providing movement joints at the perimeter of the installation Perimeter joints are absolutely necessary and do not interrupt the tile field The next step would be to place movement joints at the thresholds between rooms or where a tiled hallway meets a larger tiled room These locations are relatively inconspicuous and the lines formed by the movement joints are logical in that they reflect the natural perimeter of each room Finally determine if any other characteristics of the floor plan invite the placement of additional movement joints In this example the intersection of the nook area and kitchen family room may be a reasonable choice Figure 5 20 MOVEMENT JOINTS Schluter Systems understands that the tile setter must take into account the needs of his or her client in determining the placement of movement joints in a tile installation For example a client may not wish to interrupt a continuous tile field that soans multiple rooms However as indicated by the orange lines above there are ways to meet industry guidelines that will serve to provide the client with a durable installation that remains aesthetically pleas
62. oints are mandatory see page 18 of this Handbook Concrete Wood Substrate Balcony and Terrace EH luto da torri RM Ho TE na SOS pg ors Fo fF y K py 6 gy Fr LLL LL P4 Soy 2 E r wong dup EEEL LIA gx 2 AD a Schluter products make it easy to construct functional balcony coverings that include subsurface drainage uncoupling waterproofing tightly sealed wall joints and gutters 16 EXTERIOR APPLICATIONS Concrete or Wood Substrate Balcony and Terrace Schluter TROBA TROBA PLUS TROBA and TROBA PLUS are reliable long lasting drainage mats for installation over horizontal sloped waterproofing layers Any water that penetrates the mortar bed is directed under normal gravitational force to the drainage exits In addition the waterproofing layer 15 effectively protected from damage Schluter BARA RTK BARA RTK is an edging profile with a drip lip for installation over an existing sloped substrate The profile has a special flange for attaching the BARIN gutter system RONDEC or JOLLY profiles can be laid over the top of the stepped bonding flange to finish the edge of the tile As an alternative tiles can be installed with an overhang Schluter BARA RK BARA RK is a I shaped finishing profile for screeds The finishing leg has a protruding drip lip which cove
63. oists or trusses Floors Interior Ceramic Porcelain Tile 16 406 mm o c joist spacing single layer OSB or plywood subfloor Areas of Application over any even and structurally sound OSB plywood subfloor with 16 406 mm o c joist spacing interior dry or wet areas Limitations minimum 2 x 2 50 mm x 50 mm tile for natural stone see detail D W S page 8 and natural stone discussion page 26 Requirements maximum spacing of joists I joists or floor trusses is 16 406 mm o c minimum subfloor thickness 19 32 5 8 nom 16 mm tongue and groove with 1 8 3 mm gap between sheets Substrate Preparation verify that subfloor panels are properly fastened to framing members any leveling of the subfloor must be done prior to installing DITRA and DITRA XL Movement Joints DITRA and DITRA XL do not eliminate the need for movement joints including perimeter joints within the tiled surface Movement joints must be installed in accordance with industry standards and norms see page 18 of this Handbook TCNA EJ171 and TTMAC 301 MJ 6 WOOD Floors Interior Ceramic or Porcelain Tile Setting and Grouting Materials latex portland cement p c mortar ANSI A118 11 unmodified thin set mortar ANSI A118 1 grout ANSI A118 3 A118 6 A118 7 A118 8 Setting and Grouting Specifications tile ANSI A108 5 grout ANSI A108 6 A108 9 A108 10
64. olated from adjacent walls to prevent sound energy transfer Thus perimeter joints serve to accommodate expansion of the tile assembly and prevent flanking sound transfer Schluter Systems provides a range of prefabricated movement joint profiles that can be used to limit movement stresses due to changes in moisture content temperature and loading and limit sound energy transfer 28 SOUND CONTROL Explanation of how Schluter DITRA functions To understand how the DITRA system works it is important to first understand what a tile assembly is how it functions and how stresses occur within the assembly A tile installation is a composite assembly that consists of layered components underlayments bonding mortars tile etc The primary sources of stress in this composite system are movements due to loading changes in temperature and changes in moisture content either in the substructure or in the components of the tile assembly including the tile itself When an installation is subjected to these movements compressive and tensile stresses develop within the assembly and interact to produce shear stresses at the interfaces between the layered components Therefore a tile assembly must be able to perform well under load and at the same time provide flexibility within the shear plane The method used to establish the overall performance of a tile assembly under loading is the ASTM C627 Standard Test Method for Evaluating Ceramic Floor Ti
65. on throughout the assembly oince DITRA is virtually incompressible within the tile assembly the advantages of uncoupling are achieved without sacrificing point load distribution capabilities DITRA provides a reliable installation system that allows the integration of radiant heat and rigid surface coverings enabling the tile contractor to take advantage of this rapidly growing market segment Wood Substrate Electric thin mat or wire system D RE 15 Ceramic or stone tile Unmodified thin set mortar DITRA or DITRA XL uncoupling membrane Unmodified thin set mortar Electric thin mat or wire Latex p c mortar Plywood or OSB Joists I joists or trusses oe m 1 e LM c T Pari T a bar 653 653 3 3 kk 12 HEATED FLOORS Areas of Application over any even and structurally sound substrate interior dry or wet areas according to heating system manufacturer s recommendations Limitations minimum 2 x 2 50 mm x 50 mm tile Requirements for wood substrates subfloor underlayment configuration according to detail D W16 T D W19 T D W24 T D W24 XL T or D W S D W24 XL T for use with DITRA XL only for concrete substrates see detail D C TS Substrate Preparation any leveling of the assembly must be done prior to installing DITRA and DITRA XL additional preparation according to heating System manufacturer s directions Movement Join
66. onable or not recommended The challenges associated with gypsum based underlayments include the requirement of an extended drying period before installing tile and continued sensitivity to the reintroduction of moisture throughout the life of the installation In addition since the coefficient of thermal expansion of gypsum concrete is substantially greater than that of ceramic tile shear stresses caused by temperature fluctuations can result in delamination or cracking of the tile covering This is particularly important when gypsum concrete is used as a thermal mass for radiant heated floors With the increasing popularity of radiant heated floors which typically utilize gypsum concrete tile installers need a reliable installation system to address these issues Schluter DITRA s uncoupling function protects the ceramic or stone tile covering by neutralizing the differential movement stresses between the gypsum concrete substrate and the tile thus eliminating the major cause of cracking and delaminating of the tiled surface if not prevented could significantly compromise performance of the underlayment and lead to damage of the The residual moisture in gypsum concrete is allowed to escape through the air channels on the underside of the DITRA matting This is particularly important since gypsum concrete must dry in order to gain strength DITRA s waterproofing function prevents the reintroduction of moisture to gypsum concrete underlayments
67. ortar ANSI A118 1 grout ANSI 118 3 118 6 A118 7 A118 8 Setting and Grouting Specifications tile ANSI 108 5 grout ANSI A108 6 A108 9 A108 10 Other Considerations where a waterproof floor is required DITRA and DITRA XL seams and floor wall transitions must be sealed with Schluter KERDI BAND using unmodified thin set mortar see page 14 certain moisture sensitive stones e g green marble or resin backed tiles may require special setting materials Consult stone supplier and Schluter Systems for more information HEATED FLOORS 13 WATERPROOFING Every substrate presents unique D WP 15 Tile or wood base Ceramic or stone tile RONDEC DILEX EKE Unmodified thin set mortar KERDI BAND DITRA or DITRA XL uncoupling membrane Thin set mortar per appropriate detail Today s construction methods which include the use of lightweight moisture sensitive materials such as plywood OSB and gypsum concrete have made the installation of hard surface coverings particularly challenging If wood or gypsum concrete substrates are exposed to moisture the tile layer above can be damaged as a result Typical areas that require waterproofing include tub surrounds and showers However there are other commonly tiled areas that may through unexpected circumstances become exposed to significant amounts of water for example an overflowed toile
68. ovide the necessary performance in DITRA installation systems the following tests were performed First unmodified mortars from two different manufacturers were used to bond porcelain tile to DITRA over a single layer of 3 4 plywood with joists spaced at 19 2 o c The two installations were tested according to the ASTM C627 Standard Test Method for Evaluating Ceramic Floor Tile Installation Systems Using the Robinson Type Floor Tester and produced ratings of heavy and light Heavy indicates a performance level acceptable for shopping malls stores commercial kitchens work areas laboratories auto showrooms and service areas shipping receiving and exterior decks while ight indicates a performance level acceptable for light commercial use in office space reception areas kitchens and bathrooms Given that the test assemblies only utilized a single layer of plywood these high performance ratings demonstrate that unmodified mortar can provide a secure bond even over a bending and deflecting substrate Tiles were removed from each of the ASTM C627 specimens after the Robinson test was complete and then used to evaluate shear bond strength between the unmodified mortar and the tile Test results are summarized in the table below Mortar Type T Shear Test Results Applicable ANSI Standard Test Report Number ASTM C627 Test Rating Test Report Number psi Manufacturer 1 Specimens 327 267 267 246 Unmodified A118 1 TCA 046 03 B H
69. porcelain tile to DITRA in both interior and exterior applications See relevant testing data on page 24 Remember the type of mortar used to apply DITRA depends on the type of substrate The mortar must bond to the substrate and mechanically anchor the fleece on the underside of the DITRA For example bonding DITRA to wood requires latex modified thin set mortar When bonding DITRA to particularly dry porous concrete with unmodified thin set mortar the slab should be moistened to saturate the concrete and help prevent premature drying of the mortar Excess or standing surface water must be removed prior to installation Additionally all mortars modified and unmodified have an acceptable temperature range that must be observed during application and curing THIN SET FACTS 23 Evaluation of mortar types used with Schluter DITRA As stated previously in this Handbook Schluter Systems recommends the use of unmodified thin set mortar between DITRA and the ceramic or porcelain tile covering In this section we will address concerns regarding the use of unmodified mortar over DITRA and provide insight into the overall function of the tile assembly using experimental data The Tile Council of North America was contracted to perform independent testing of all experimental setups described hereafter A popular misconception in the tile industry is that porcelain tile cannot be bonded using unmodified mortar To show that unmodified mortar will pr
70. raming members any leveling of the subfloor must be done prior to installing DITRA and DITRA XL Movement Joints DITRA and DITRA XL do not eliminate the need for movement joints including perimeter joints within the tiled surface Movement joints must be installed in accordance with industry standards and norms see page 18 of this Handbook TCNA EJ171 and TTMAC 301 MJ Setting and Grouting Materials latex portland cement p c mortar ANSI A118 11 unmodified thin set mortar ANSI A118 1 grout ANSI A118 3 A118 6 A118 7 A118 8 Setting and Grouting Specifications tile ANSI A108 5 grout ANSI 108 6 A108 9 A108 10 Other Considerations tightly butted and or tented plywood or OSB seams must be addressed prior to installing DITRA and DITRA XL vapor barrier on crawl space floors according to regional building codes a where a waterproof floor is required all DITRA and DITRA XL seams and floor wall transitions must be sealed with Schluter KERDI BAND using unmodified thin set mortar see page 14 24 610 mm o c joist spacing double layer OSB or plywood subfloor Areas of Application over any even and structurally sound double layer OSB or plywood floor Interior dry or wet areas Limitations minimum 2 x 2 50 mm x 50 mm tile Requirements maximum spacing of I joists or floor trusses is 24 610 mm o c double layer wood floor consisting of e minimum s
71. rs the exposed edge of the TROBA drainage mat 4 4 4 n 4 4 4 f 4 4 4 4 4 4 4 Schluter BARA RTK Schluter BARA RK EXTERIOR APPLICATIONS Concrete or Wood Substrates Balcony and Terrace 7 MOVEMENT JOINTS Every substrate presents unique challenges 18 MOVEMENT JOINTS DISCUSSION Movement joints are an integral part of any tile assembly The various components of a tile assembly tile mortar substrate etc have unique physical characteristics that affect their behavior Specifically these components will expand and contract at different rates according to each component s intrinsic physical properties with changes in moisture temperature and loading both dead and live loads This differential expansion contraction of attached components results in internal stresses Furthermore structures that restrain overall expansion of the tile field walls columns etc cause stress buildup within the system If the aforementioned movements are not accommodated through the use of movement joints in the tile field and at restraining structures the resulting stresses can cause cracking of the grout and tile and delamination of the tile from the substrate Thus movement joints are an essential component of any durable tile assembly SOLUTIONS Movement joints must be incorporated within the tile field at doorsills
72. se bond coat In fact after the mortar has reached final set usually within 24 hours unmodified thin set mortars achieve higher strengths when cured in continually moist conditions QUESTION Can ceramic tile including porcelain tile be set on DITRA with latex modified thin set mortar ANSWER We DON T recommend it Here s why atex modified mortars must air dry for the polymers to coalesce and form a hard film in order to gain strength When sandwiched between two impervious materials such as DITRA and ceramic tile including porcelain tile drying takes place very slowly through the open joints in the tile covering According to the TCNA Handbook for Ceramic Glass and Stone Tile Installation this drying period can fluctuate from 14 days to over 60 days depending on the geographic location the climatic conditions and whether the installation is interior or exterior Therefore extended cure times would be required before grouting if using modified thin set mortars between DITRA and ceramic tile including porcelain tile If extended cure times were not observed the results could be unpredictable This is even more important to consider in exterior applications that are exposed to rain as there is the additional concern of latex leaching ADDITIONAL NOTES 25 years of field experience and testing by the Tile Council of North America TCNA support the efficacy of using unmodified thin set mortars to bond ceramic tile including
73. t or ruptured dishwasher icemaker or washing machine lines which can result in flooding Waterproofing these floors can save an owner from replacing the tile assembly and substructure in the event of a leak Schluter DITRA and Schluter DITRA XL installations can be made waterproof with minimal effort Since the mattings are made of waterproof polyethylene the only extra step necessary is to seal the seams and floor wall connections This is easily accomplished by applying Schluter KERDI BAND to these areas using an unmodified thin set mortar The result is a waterproof installation that will not suffer damage the event of an unexpected water leak Schluter KERDI DRAIN or Schluter KERDI LINE may be used to provide drainage in DITRA and DITRA XL installations DITRA and DITRA XL meet the requirements of the American National Standard for Load Bearing Bonded Waterproof Membranes for Thin Set Ceramic Tile and Dimension Stone Installations ANSI A118 10 and are listed by cUPCe and evaluated by ICC ES 5 2467 Floors Interior Ceramic Stone Tile Areas of Application Other Considerations over any even and structurally sound seaming DITRA and DITRA XL including substrate where waterproofing is desired floor wall connections with KERDI BAND Limitations may be appropriate in cases where a break in the water line of an ice maker or dishwasher minimum 2 x 2 50 mm x 50 mm tile M i can damage pre existi
74. t applications without sacrificing the energy efficiency of the system However there are inherent challenges in combining rigid surface coverings with radiant panel heating systems A viable installation system must address the magnified fluctuations in temperature that contribute to increased shear stresses between the heated assembly and the tile covering The system must also limit thermal striping by promoting even heat distribution and protect the assembly from moisture which 15 particularly important when gypsum concrete is used as the thermal mass Differential movement stresses are magnified in radiant heated floor applications because of significant temperature gradients Schluter DITRA s uncoupling function protects the ceramic or stone tile covering by neutralizing the and delaminating of the tiled surface DITRA s waterproofing function provides simple effective and permanent protection for moisture sensitive substrates such as gypsum concrete and wood used in heated floor applications pas differential movement stresses between the heated assembly and the tile thus eliminating the major cause of cracking S 3a cn The open rib structure of the DITRA matting allows the residual moisture in the substrate to escape This is particularly important for gypsum concrete since it must dry in order to gain strength In addition the free space beneath the matting limits thermal striping by promoting even heat distributi
75. te slabs are also commonplace in today s construction environment Although pre stressing 15 used to help control deflections in concrete structures these slabs are still subject to deformations caused by changes in moisture temperature and loading Many concrete slabs on or below grade are subject to moisture migration which can be problematic Furthermore these structures experience the same deformations as stated above Schluter DITRA s uncoupling function protects the ceramic or stone tile covering by neutralizing the differential movement stresses between the concrete substrate and the tile thus eliminating the major cause of cracking and delaminating of the tiled surface drying of fresh concrete which reduces the chances of cracking and curling of the slab The free space beneath the DITRA matting provides a route for any residual moisture in the concrete slab to escape This VEN DITRA waterproofing ability not only protects the substrate from moisture and harmful substances it also slows the allows the installation of DITRA and the tile covering as soon as the slab can be walked upon Vapor management is also a essential for slabs subject to moisture migration md fia Since DITRA is virtually incompressible within the tile assembly the advantages of uncoupling are achieved without sacrificing point load distribution capabilities This allows DITRA to be installed in commercial and industrial applications expos
76. ts DITRA and DITRA XL do not eliminate the need for movement joints including perimeter joints within the tiled surface Movement joints must be installed in accordance with industry standards and norms see page 18 of this Handbook TCNA EJ171 and TTMAC 301 MJ Setting and Grouting Materials latex portland cement p c mortar ANSI A118 11 unmodified thin set mortar ANSI A118 1 grout ANSI A118 3 A118 6 A118 7 A118 8 Setting and Grouting Specifications tile ANSI A108 5 grout ANSI A108 6 ANSI A108 9 ANSI A108 10 a heating system follow manufacturer s directions Other Considerations install heating cable system per heating manufacturer s directions encapsulate heating cables in a skim coat of latex p c mortar or a cement based leveling compound and allow to cure before installing DITRA or DITRA XL with unmodified thin set mortar install electric thin mat per heating manufacturer s directions and install DITRA or DITRA XL with unmodified thin set mortar vapor barrier on crawl space floors according to regional building codes where a waterproof floor is required all DITRA and DITRA XL seams and floor wall transitions must be sealed with Schluter KERDI BAND using unmodified thin set mortar see page 14 certain moisture sensitive stones e g green marble or resin backed tiles may require special setting materials Consult stone supplier and Schluter Systems
77. ubfloor thickness 23 32 3 4 nom 19 mm tongue and groove e minimum underlayment thickness 11 32 3 8 nom 10 mm Substrate Preparation verify that subfloor panels are properly fastened to framing members underlayment minimum 11 32 3 8 nom 10 mm thick Exposure 1 plugged face plywood or OSB with 1 8 3 mm gap between sheets see page 21 for underlayment installation guidelines any leveling of the assembly must be done prior to installing DITRA and DITRA XL Movement Joints amp DITRA and DITRA XL do not eliminate the need for movement joints including perimeter joints within the tiled surface Movement joints must be installed in accordance with industry standards and norms see page 18 of this Handbook TCNA EJ171 and TTMAC 301 MJ Setting and Grouting Materials latex portland cement p c mortar ANSI A118 11 unmodified thin set mortar ANSI A118 1 grout ANSI A118 3 A118 6 A118 7 A118 8 Setting and Grouting Specifications tile ANSI A108 5 grout ANSI 108 6 A108 9 A108 10 Other Considerations tightly butted and or tented plywood or OSB seams must be addressed prior to installing DITRA and DITRA XL vapor barrier on crawl space floors according to regional building codes a where a waterproof floor is required DITRA and DITRA XL seams and floor wall transitions must be sealed with Schluter KERDI BAND using unmodified thin set mortar se
78. ue to loading and changes in temperature and moisture HOW DOES IT WORK 29 PRODUCT amp ORDERING INFO The ordering information for the Schluter DITRA Schluter DITRA XL and Schluter KERDI components outlined in this Handbook is located below For technical support Illustrated Price List or to receive additional information on our complete product line please call 1 800 472 4588 USA or 1 800 667 8746 Canada or visit our comprehensive website at www schluter com Schluter DITRA DITRA is a pressure stable polyethylene membrane vacuum formed in a cutback grid design with an anchoring fleece laminated to its underside DITRA is 1 8 8 mm in height and emits zero VOC Schluter DITRA Uncoupling and waterproofing membrane 1 8 3 mm thick Item No Dimensions DITRA 5M Soo x Ono tom o me DITRA 150 S e AS OY SO Ir aac dat ag d RE DITRA 30M 6 6 oS 8 OPE wm ol Schluter DITRA XL y DITRA XL is a pressure stable polyethylene membrane vacuum formed in a cutback grid design 4 a with an anchoring fleece laminated to its underside DITRA XL is 5 16 7 mm in height and emits zero VOC Schluter DITRA XL Uncoupling and waterproofing membrane 5 16 7 mm thick Item No Dimensions DITRA XL 1 75 5r se er eus Wm Weiss Schluter KERDI BAND KERDI BAND is a waterproofing strip used to seal butt joi
79. usion of DITRA which is due to the product s flexibility in the shear plane Assembly Average Maximum Shear Stress psi Tile over concrete 208 Tile and DITRA over concrete Tile has been successfully installed for thousands of years by incorporating an uncoupling layer or forgiving shear interface between the tile assembly and the substrate This practice has evolved from the sand strata method tile set in mortar over a layer of tamped sand to the unbonded mortar bed method tile set in mortar over a cleavage membrane However this alone does not ensure a high performance tile installation The tile covering must be well supported so that loads can be distributed through the assembly to the substructure without damaging the tile covering Therefore a viable tile assembly must be designed to incorporate both support load distribution of the tile layer and flexibility within the shear plane e g a traditional unbonded mortar bed allows for flexibility at the shear plane through a cleavage membrane but still provides a solid base for the tile layer Since DITRA utilizes geometric flexibility in the shear plane rather than material flexibility the advantages of uncoupling are achieved without sacrificing load distribution capabilities of the tile assembly Thus it is the combination of geometric flexibility in the shear plane and support in the normal direction that allows DITRA to protect the tile layer from stresses d

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