BBA Certificate
Contents
1. insulated reveal masonry substrate _ RiR ey EL uninsulated reveal ue Do pq ele x StoSeal tape EPS bonded to main EPS with adhesive cavity fire stop S lt SS insulated reveal steel frame substrate EPS insulation Page 21 of 24 Figure 11 Typical arrangement of deflection channels over openings eflection channel 150 mm window opening E VS Q el deflection channel lection channel intermediate track Pa window opening E pe Figure 12 Window head detail mastic seal RAS drainage channel Se La LEER s adhesive StoSeal Tape window sill installe2. steeHrame substrate substrate reinforcing mesh embedded in basecoat finish coat EPS cap covering e StoRotofix Plus fixing StoRotofix Plus fixing 120 mm 200 mm backwrap of mesh embedded in adhesive dpc typical arrangement StoSeal Tape 2D packing shim starter track Y typical finish outside scope of this Certificate dpc Rotofix detail nominal 20 mm drainage cavity sheathing board on steelframe substrate OOX XX xx HH screw fixing dpc mesh laid aluminium in track starter track mastic mesh angle bead PU foam detail of backwrap light steel frame intermediate track d c dpc aluminium P aluminium adhesive starter track starter track packing shims fixing to suit substrate system installation pullout tests mechanical system Page 15 of 24 Figure 4 Typical section at base level intermediate track dpc dpc aluminium starter track aluminium starter track packing shims fixing to suit substrate installation pullout tests adhesive system mechanical sys
3. APPROVAL Sto Lid BBA i CERTIFICATION 2 Gordon Avenue TECHNICAL APPROVALS FOR CONSTRUCTION Hillington Park Glasgow G52 4TG Agr ment Certificate Tel 0141 892 8000 Fax 0141 404 9001 email info uk stoeu com 95 3 1 32 website www sto co uk Product Sheet 1 STO EXTERNAL WALL INSULATION SYSTEMS STOTHERM CLASSIC EXTERNAL WALL INSULATION SYSTEMS This Certificate relates to StoTherm Classic External Wall Insulation Systems comprising expanded polystyrene EPS insulation boards with glassfibre reinforcing meshes render finishes and featuring three alternative fixing methods for use on solid masonry and timber or sheathed lightsteel frame constructions on new or existing domestic and non domestic buildings AGR MENT CERTIFICATION INCLUDES e factors relating to compliance with Building Regulations where applicable e factors relating to additional non regulatory information where applicable independently verified technical specification assessment criteria and technical investigations design considerations installation guidance regular surveillance of production formal three yearly review KEY FACTORS ASSESSED Strength and stability the systems can adequately resist wind loads and in certain applications impact damage see section 5 Behaviour in relation to fire the render finishes have a surface spread of flame classification of Bs2 d0 Depending upon the wall construction the
4. e adhesive mortar to withs L 4 and the wind loading see section 5 11 he use of the systems without supplementary fixings can be obtained from the Certificate holder ve wind pressure suction is resisted Classic Rotofix Plus Mechanical insula the strength of the Rotofix Plus fixing and the resistance to pull out between the fixing and substrate wall t and substrate wall Classic Adhesive insulation systems Classic Rotofix Plus Mechanical insula rength of the render and insulation through the fixings and into the substrate wall E Classic Mechanical insulation sys Classic Adhesive insulation systems 5 8 The wind load 133 85 6399 2 1997 Special consideratio additional fixings o and the adhesive bond strength between the adhesive and substrate em by the bond between the render and the insulation boards the flexural the chosen fixing method one of I E ion systems the resistance to pull over of the fixing from the Classic Mechanical insulation systems M the resistance to pull over of the rail from the insulation the ull over of the rail from the rail fixing and the resistance to pull out between the KJ the adhesive bond strength between the insulation and the o the substrate wall directly via compression and bending of the render ixing method one of g 4 ion systems the bearing of the insulation onto the su
5. Limiting resistance Pa 1533 2400 1300 2222 1 From test results see section 5 11 2 Based upon the EPS used and the manufacturing controls in place 3 From site tests see section 5 12 4 The lesser of the board design pull out resistance and the resistance to wind loads for the system This value must be higher than the value calculated from section 5 8 see section 5 12 5 12 An appropriate number of site specific pull out tests shall be conducted on the substrate of the building masonry concrete or plain sheathing board to determine the minimum resistance to failure of the fixings The characteristic pull out resistance should be determined in accordance with the guidance given in ETAG O14 2002 Annex D using 60 of the mean value of the five smallest measured values at the ultimate load The design pullout resistance per square metre is the mean pullout resistance multiplied by the number of fixings minimum of either 4 or 6 and divided by a factor of safety of 2 This value must be higher than the resistances given in section 5 11 5 13 For the StoTherm Classic Adhesive insulation systems K an appropriate number of site specific bond strength tests should be conducted on the substrate of the building to determine the minimum resistance to failure of the adhesive The design bond strength is the average of the five smallest measured values at the ultimate load divided by a factor of safety of 9 A 14 The mechanica
6. floors and walls and at win points Items such forming at these 10 4 The systems can maintain or contribute to maintain dow and door reveals to avo eel C sections 1 2 mm thick with 50 mm flanges A 50 Wm K 1 ment particle board X 0 23 W m K 1 vity spacer A 0 17 W m KJ 15 mm unventilated cavity BS EN ISO 6946 2007 LK 2007 AKI The effect of PVC fixing rail is less than 3 of the U value The effect of the aluminium fixing rail is greater than 3 of the U value and should be uld refer to the detailed guidance given in documents ing continuity of thermal insulation Care must be ate thickness of insulation is used particularly at points such as junctions between id thermal bridging and reduce the risk of condensation as windows and doors should be selected taking into account the thickness of insulation required at the reveals to help prevent condensation forming at these junctions Detailed guidance for junctions and on limiting heat loss England Construction De and Wales tails version Approved 1 0 by air infiltration can be found i n Scotland Accredited Construction Details Scotland Northern Ireland Accredited Construction Details version 1 0 11 Maintenance and repair ints with other elemen Documents to Part L and for new thermal elements to existing buildings Accredited for new build see also SAP 2009 Appendix K and the iSBEM User
7. silicone based textured coa olotusan a ready mixed silicone based textured coating to Dash Finish a spardash aggregate 3 mm to 6 mm for use with StoSilco MP toColor Maxicryl StoColor Crylan StoSilco Color Stolotusan Color and StoColor Jumbosil acrylic or silicone ased paints available in a range of colours L eoo cococococococonQo c A o Primer an acrylateccopolymer based tinted primer used as a bonding agent and pre coat to control suction Page 4 of 24 Figure 1 StoTherm Classic External Wall Insulation Systems substrate Sto Armat Classic Sto Armat Classic m i 5 o g 9 5 E E o g DEMRGUEMS DEMEURE 9 SSSSS EAN E SVT SU m DEAS Ss o VN MD SU SSS SERE DIGG SANE RN insulation board S Stolevell Uni adhesive substrate render finish SS SMS NANNAN S Dmm SSS mechanical fixing Sto PVC intermediate track L packing shims adhesive system mechanical system light steel frame substrate nominal 20 mm wide drainage cavily render finish mS TST SEN SSSSSSSSSSSSAA W SSQ NSQNE SuSE c SE WJ SEGA E E RE L reinforcement
8. 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic Northern Ireland Technical Booklet L 8 Rain penetration 8 1 Guidance in BRE Report BR 262 2002 Thermal insulation avoiding risks should be followed in that the designer should select a construction appropriate to the local wind driven rain index paying due regard to the design detailing workmanship and materials to be used Additional guidance can be found in England and Wales Approved Document C Section 5 Scotland Mandatory Standard 3 10 clauses 3 10 12 and 3 10 20 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic Northern Ireland Technical Booklet C Section 2 8 2 The systems have been assessed for use in sheltered areas when installed onto light steel framework 8 3 Inall cases care should be taken to ensure that walls are weathertight prior to application of the insulation 33 a systems The insulation systems shall only be installed where there are no signs of dampness on the inner surface of the substrate other than those caused solely by condensation 8 4 Where used the sheathing board substrate shall be of a suitable exterior grade with appropriately sealed joints sealed penetrations and vapour control layers where required Examples of relevant detailing for external wall insulation systems with a drainage cavity can be seen in SCI Publication P343 Insulated Render Systems Us
9. 15 35 The Sto reinforcement mesh is immediately embedded into the wet reinforcement coat overlapping at all mesh joints by not less than 100 mm Corner details are reinforced using Sto PVC Mesh Angle Beads for external corners and Sto Armour Angle in internal corners 15 36 Additional pieces of reinforcing mesh 450 mm by 250 mm are used diagonally at the comers of openings see Figure 7 Figure Z Additional reinforcement at openings glassfibre mesh 250 mm x 450 mm at 45 NUN Page 18 of 24 15 37 The mesh should be free of wrinkles and fully embedded in the base coat with the mesh pattern just visible on the finished surface The Sto logo should not be visible through the cured reinforcing coat 15 38 The base coat shall be left to dry thoroughly before application of the decorative finish Depending on conditions the drying time will be between 24 hours and 48 hours Low temperatures or high humidity may increase drying time Finishing 5 39 The render finishes are prepared in accordance with the Certificate holder s Technical Datasheets and project method statement and are trowelapplied using a stainless steel trowel or spray applied in thicknesses from 1 5 mm to 6 mm depending on the product used and the aggregate grain size 5 40 Sto Dash Finish may be applied to StoSilco MP The coating must be at least 6 mm thick with the 3 mm to 6 mm aggregate applied immed
10. C5 Condensation Comment Walls insulated with the systems contribute to minimising the risk of interstitial condensation to satisfy this Regulation See sections 9 1 and 9 8 to 9 10 of this Certificate Regulation D1 Stability Comment The insulation systems can sustain and transmit wind loads to the substrate wall See sections 5 8 and 5 14 of this Certificate Regulation E5 a External fire spread Comment The use of the insulation systems is restricted by this Requirement See sections 6 1 to 6 6 of this Certificate Regulation F2 a i Conservation measures Regulation F3 2 Target carbon dioxide Emissions Rate Comment The insulation systems can contribute to satisfying these Regulations See sections 10 1 and 10 4 of this Certificate Construction Design and Management Regulations 2007 Construction Design and Management Regulations Northern Ireland 2007 Information in this Certificate may assist the client CDM co ordinator designer and contractors to address their obligations under these Regulations See section 2 Delivery and site handling 2 4 of this Certificate Additional Information NHBC Standards 2011 NHBC accepts the use of StoTherm Classic External Wall Insulation Systems when installed with a cavity and used in accordance with this Certificate in relation to NHBC Standards Part 6 Superstructure excluding roofs Chapters 6 9 Curtain walling and cladding and 6 10 Light steel framed walls
11. The Certificate holder can advise on suitable sealants and backer rods Figure 2 Movement joints movement joint in substrate intermediate track expansion joint expansion joint mineral quilt to prevent cold bridge P in line joint Type E corner joint Type V 15 7 Where necessary movement beads are fixed vertically in predetermined positions across the building depending on the individual requirements of each job 15 8 The movement joint sealant shall not come into direct contact with the insulation board Therefore it is essential to ensure that the reinforcement mesh and the reinforcement coat are taken around the complete edge of the insulation board StoTherm Classic Rotofix Plus Mechanical insulation systems 15 9 For Sto Rotofix Plus mechanical system installations beginning at the base of the wall the Sto aluminium horizontal starter track is used to mount the first row of boards For installations commencing at firsHloor level either the Sto aluminium starter track or a temporary timber batten may be used The aluminium profiles are fixed to the substrate with Sto hammerdrive fixings or screws with a fixing at each end of the track fixings must accommodate the thermal expansion of the track at maximum of 300 mm centres see Figure 3 Care shall be taken not to overdrive the fixings The insulation boards are installed
12. and floors General This Certificate relates to StoTherm Classic External Wall Insulation Systems as applied to the outside of external walls of masonry dense or nofines concrete on new or existing domestic and non domestic buildings They can also be installed onto timber or sheathed lightweightsteeHramed structures where the steel frame forms the primary structure for the building For timberframed constructions a breather membrane must be secured to the sheathing and an appropriate cavity created with a nominal width of 20 mm Where required for installations onto lightweight steeHramed walls Sto Mechanical systems should be installed with the appropriate drainage cavity In some applications not requiring NHBC Approval or where water ingress will not cause damage to the wall construction the systems can be applied directly to an appropriately rigid see section 5 13 sheathed light steel frame For these applications the insulation systems must be fixed and restrained in exactly the same way as they would be if fixed back to a masonry substrate The building designer must ensure that moisture cannot enter the wall construction and that resistance to moisture is maintained throughout the design life of the facade see sections 8 and 9 The insulation systems are manufactured by Sto AG in Germany and are imported and marketed in the UK by the Certificate holder Technical Specification 1 Description 1 1 StoTherm Clas
13. as a result of installing the h n he proposed insulation system and associated fixing layout or adhesive provide adequate resistance appropriate to h ive wind loads based on the results of the site investigation d loads depends upon the fixing system used see Table 5 Classic Rotofix Plus Mechanical insulation systems tests carried out on an installation with tongue and sulation boards with a minimum of four and a minimum of six fixings per square metre indicated that the d 2500 Pa respectively ms M tests carried out on an installation with horizontal rails fixed that the system can resist a wind load of 1300 Pa Page 8 of 24 Table 5 Sto external wall insulation systems example wind loading calculations Characteristic StoTherm Classic StoTherm Classic Rotofix StoTherm Classic StoTherm Classic Adhesive Rotofix Plus Plus Mechanical Mechanical insulation insulation Mechanical insulation insulation systems systems systems systems 4 fixings 6 fixings M K Resistance to wind loads Pa 2300 3900 3900 Material factor 1 5 1 5 3 Design resistance to wind loads Pa 1533 2600 1300 Characteristic anchor pull out 800 800 650 10000 resistance per anchor or adhesive bond strength N Factor of safety 2 2 2 9 Design pull out resistance or design 400 400 325 1111 adhesive bond strength N Design pull out resistance multiplied 1600 2400 1950 by the number of fixings N
14. materials and execution of masonry BS EN 1996 3 2006 Eurocode 6 Design of masonry structures Simplified calculation methods for unreinforced masonry structures BS EN 10326 2004 Continuously hotdip coated strip and sheet of structural steels Technical delivery conditions BS EN 13501 1 2007 Fire classification of construction products and building elements Classification using test data from reaction to fire tests BS EN 13914 1 2005 Design preparation and application of external rendering and internal plastering External rendering BS EN 15026 2007 Hygrothermal performance of building components and building elements Assessment of moisture transfer by numerical simulation BS EN ISO 6946 2007 Building components and building elements Thermal resistance and thermal transmittance Calculation method BS EN ISO 10211 2007 Thermal bridges in building construction Heat flows and surface temperatures Detailed calculations ETAG 014 2002 Guideline for European Technical Approval of Plastic Anchors for fixing of External Thermal Insulation Composite Systems with Rendering Page 23 of 24 Conditions of Certification 19 Conditions 19 1 This Certificate relates only to the product system that is named and described on the front page is issued only to the company firm organisation or person named on the front page no other company firm organisation or person may hold or claim that t
15. mesh Sto Armat Classic Sto Rotofix Plus fixing starter track sheathing board Rotofix Plus 1 5 Ancillary items for use with the systems are e Sto aluminium starter intermediate fixing track e Sto PVC e Sto T spline U starter intermediate fixing track T profiles PVC or aluminium 1 e PVC packing shims of varying sizes used to ensure the level of the finished surface and maintain the drainage cavity Page 5 of 24 e Sto mineral fibre fire break boards Sto Rotofix Plus fixing StoPrim Fungal StoPlex W sealer StoPrim Micro sealer e Sto PVC Mesh Angle Bead Sto detail mesh e StoArmour Angle e Sto Movement Joint Type E e Sto Movement Joint Type V e StoSeal Tape e Sto PU foam filler StoDeco Profiles recycled mineral granulate profiles for architectural details StoDeco Coll Adhesives for StoDeco Profiles e SS hammer drive fixings Sto fixings e deflection channels for deflecting water around openings drainage profiles to allow the drainage of water from the cavity to the external face of the wall where required e Sto F505 sealant 1 6 Quality control checks are carried out on the incoming materials during production and on the f inished product 2 Delivery and site handling 2 1 The insulation boards are delivered in shrinkwrapped polythene packs bearing the Sto logo manufacturer s
16. shou reinforcement mesh using alternative means 5 47 The insulati Tape or in uninsulated reveals openings if required to maintain the continuity of the insulation water away from Tape is installed StoSeal 15 2 6 StoSeal 15 2 6 5 50 When th fitted within the d cavity away from and 12 5 5 Mineral d be taken in and a polythene maskin or 15 5 12 may be used see the Certi e insulation systems are used in steel framed buildings rainage cavity above openings such as windows and doors at an an horizontal and 150 mm beyond each side o 5 52 On completion external fittings shou information the Certificate holder s advice sh Figure 9 Typical eaves details on on systems shall be sealed around window frames and si StoSeal F 505 sea 5 48 Window sills shall be suitable for example designed for use wi the joints between the render and open between the vertical flange and the window frame and beneath the si ibre lamella Class A1 fire break boards are adhesi position using Sto levell Uni ffit a seal is instal d be refixed to the subst ould be sought Is tog ant see Figure 10 Additional i th an extern ing detail by for example fitti ishes Where th ficate holder for details that have a dra ected by a suitable capping coping detail Render finishes are not suitable for exposed horizontal ed between the insulant and the underside of the soffi
17. the insulation is transferred to the substrate via the relevant fixing method The number and the span between rail fixings the number and span between Rotofix Plus fixings or the s 5 4 Where consideratio 4 n provided the fastenings are ancho vitability of adhesive should be determined by the building designer either of the mechanical fixing systems is used the condition of the surface to receive the product is not a red into a substrate capable of supporting the loads imposed by the external insulation plus the forces acting upon it Trial tests shall be conducted on the walls of the building see section 5 11 5 5 Where the adhesive insulation system is used trial tests shall be conducted on the walls of the building to determine the adequacy of the adhesive to withstand the expected wind loading derived from calculations using the relevant wind speed data for the site and a safety factor of 9 A recommendation is made on the type and number of fixings required to complement th 1 Details of 5 6 Negati strength of the render and insulation and depending upon e StoTherm nsulation e StoTherm fixing rai e StoTherm adhesive 5 7 Positive wind load pressure is transferred t and insulation and depending upon the chosen e Stolherm flexural st e StoTherm strength of the render and insulation through e StoTherm substrate strength of the rail the resistance to p
18. vertical joints staggered by a m inimum of 200 mm The insulation boards must not be knocked onto the wall The position of the board can be adjusted within 1O minutes of application Open joints in the insulation systems should be filled with slivers of insulation board or Sto PU foam and any high spots or irregularities removed by lightly planing with a rasp once the Turbofix adhesive has cured over the whole surface to provide a key for the reinforcing coat 15 32 With substrates of nofines concrete or low loadbearing capacity Sto Recessed Thermodowels are used as supplementary mechanical fixings at the specified minimum frequency of eight per square metre Page 17 of 24 Figure 6 Typical pattern for application of TurboFix longue positioned at top left when viewed from the front S SS NSS ze E NS y z RS SS Reinforcement coat 15 33 Prior to the application of the reinforcement coat seals are applied where needed and Stoseal Tape is applied to window and door frames overhanging eaves gas and electric meter boxes wall vents or where the render abuts any other building material or surface 15 34 The prepared reinforcement coat is applied to a minimum thickness of 3 mm over the insulation boards using spray equipment or a stainless steel trowel The reinforcement coat is applied progressively working in 1 m sections in a vertical or horizontal direction Reinforcing
19. 0 Bucknalls Lane fax 01923 665301 Garston Watford email mail amp bba star co uk Herts WD25 9BA website www bbacerts co uk Page 1 of 24 Regulations In the opinion of the BBA StoTherm Classic External Wall Insulation Systems if used in accordance with the provisions of this Certificate will meet or contribute to meeting the relevant requirements of the following Building Regulations the presence of a UK map indicates that the subject is related to the Building Regulations in the region or regions of the UK depicted 47 The Building Regulations 2010 England and Wales 5 Requirement Al Loading Comment The insulation systems can sustain and transmit wind loads to the substrate wall See sections 5 8 and 5 14 of this Certificate Requirement B4 1 External fire spread Comment The use of the insulation systems is restricted by this Requirement See sections 6 1 to 6 6 of this Certificate Requirement C2 b Resistance to moisture Comment The insulation systems provide a degree of protection against rain ingress See sections 3 10 and 8 3 of this Certificate Requirement C2 c Resistance to moisture Comment The insulation systems contribute to minimising the risk of interstitial and surface condensation See sections 9 1 9 6 and 9 8 to 9 10 of this Certificate Requirement L1 a i Conservation of fuel and power Comment The insulation systems can contribute to meeting this Requirement See sections 10 1 an
20. K e K9O EPS grey 0 030 W m K 10 2 The U value of a wall construction will depend on the selected insulation thickness the fixing method and the insulating value of the substrate and its internal finish Example U values are given in Tables 7 and 8 Table 7 Insulation thickness required to achieve some typical design values U value Insulation type Thickness of insulation mm Wm K StoTherm Classic Rotofix Plus StoTherm Classic StoTherm Classic Mechanical insulation Mechanical insulation Adhesive insulation systems NNA systems M si systems K 2 0 19 K7O 210 K90 230 70 90 90 grey 210 50 70 0 26 KZO 50 K90 50 20 40 90 grey 40 10 20 0 28 KZO 40 K90 40 10 30 90 grey 20 00 10 0 30 KZO 20 K90 20 00 10 K90 Grey 10 90 00 0 35 KZO 9 0 K90 OO 90 90 K90 Grey 90 80 90 Based on an uninsulated wall U value of 2 1 W m K construction Actual U value for the thickness may be better based upon incremental insulation thickness of 1O mm Rotofix fixings 6 per square metre The point of thermal transmittance of the Rotofix Plus fixing can be taken as 0 009 W m K Includes 10 mm unventilated cavity in accordance with BS EN ISO 6946 2007 Includes one 8 mm diameter stainless steel fixing where n 1 per square metre X 17 W m K per square metre Ay lt 3 of U Ay lt 3 of U for the PVC fixing rail The effect of the aluminium fixing rail is greater th
21. Manual ts and seals to ensure that ingress of water does not occur The checks should verify that 1 1 Regular checks must be made on the installed insulation systems Particular attention should be made to 237 V joi architectural details for plumbing fitments are in good joints for example should be considered for each bui Systems that are directly fixed should be effected 1 2 Th 11 3 Dam Certificate holder s technical li immediate e designer should en particular installation 1 4 Th of exposure restored by by the app transmissi on 12 Durability aged areas must be repaired using terature The Certi e finishes may become soiled in time level of atmospheric pollution and a powerwash at 30 bar maximum pressure and 30 C maximum temperature or if required overcoating ication of a further finish of paint but great care must be taken not to adversely affect the water vapour characteristics or fire properties of the insulation systems shedding water clear of the bui condition Maintenance schedules should in between the insulation systems and window and door fram Iding allowing for such fac back to sheathing boards must y and the sealant at joints at wi 4 4 4 he appropria ficate holder should be consu be inspected at ndow and door ding are present and functioning and that external clude the replacement and resealing of es The interv
22. a temporary timber batten is to be used a strip of mesh is partially adhered to the wall so that 200 mm plus the thickness of the insulation is hanging from the starting line of the installation StoArmat Classic is subsequently used to wrap the overhanging mesh around the lower edge and adhere it to the first row of insulation boards All exposed edges of the insulation boards are protected in 15 24 The adhesive is applied over the entire this manner see Figure 4 face of the insulation board a minimum of 40 coverage is required using a 15 mm by 15 mm notched trowel or in a continuous line around the perimeter of the board with six additional dabs of adhesive distributed over the remaining surface 15 25 The boards shall be pressed firmly aga inst the wall and butted tightly together with the vertical joints staggered by a minimum of 200 mm Generally insulation boards overlap at the corners of buildings see the Certificate holder for details Open joints in the insulation systems any high spots or irregularities removed by ligh reinforcing coat 15 26 With substrates of nofines concrete or should be filled with slivers of insulation board or Sto PU foam and tly planing with a rasp over the whole surface to provide a key for the ow loadbearing capacity Sto Recessed Thermodowels are used as supplementary mechanical fixings at the specified minimum frequency of eight per square metre additional fixings
23. according to rendering system rendering system BS EN 13501 1 2007 Reinforcement coat 16 Reinforcement coat 20 B s2 dO Finishing coat 14 75 Finishing coats 7 5 1 The effects of primer and paint need to be taken into account by the building designer 2 Percentage relative to the initial weight after drying Page 9 of 24 6 2 The designer should check the fire ratings which apply to the system including paint and primer to be used 6 3 The insulation material is combustible and therefore its use is restricted by the building regulations 6 4 Insulation systems are restricted for use in buildings less than 18 m in height unless they are designed in accordance with BRE Report BR 135 2003 Fire Performace of External Insulation For Walls of Multi Storey Buildings 6 5 The fire resistance performance of a wall incorporating the systems is outside the scope of this Certificate Where required this can only be determined from tests pertormed by a UKAS accredited laboratory for the test concerned 6 6 Fire stopping or fire barriers should be incorporated into a construction where required by the relevant building regulations 7 Proximity of flues and appliances When the insulation systems are installed in close proximity to certain flue pipes the relevant provisions of the national Building Regulations should be met England and Wales Approved Document J Scotland Mandatory Standard 3 19 clause 3 19 4012
24. al between inspections tors as the wall construction building location and height east once per year Necessary repairs frames replaced at regular intervals sure suitable access is available to enable maintenance inspections to take place safely te Sto components and the procedures detailed in the ted on the appropriate measures for a he rate depending on the product chosen initial colour the degree he design and detailing of the wall The appearance may be 12 1 The systems should remain effective for at least 30 years provided any damage to the surface finish is eee immediately and regular maintenance is undertaken see section 1 1 Page 12 of 24 12 2 The standard reinforcing mesh has adequate resistance to accidental damage where used in situations where walls are exposed but have some protection eg walls of private dwellings and walls of communal dwellings above ground floor level In other situations eg walls of public buildings at ground floor level the combined heavy duty and standard reinforcing meshes are required to increase the resistance to impact Guidance may be obtained from BRE Current Paper CP 6 81 1981 Assessment of external walls Hard body Impact Resistance and the Certificate holder 13 General Application of StoTherm Classic External Wall Insulation Systems should be carried out by registered installers as recommended by the Certificate holder A Certificate holder registered installer is a compan
25. an 3 of the U value and should be calculated depending upon the insulation thickness used AOaAKWN 7 Ay based on n 4 m X 50 W m K diameter of fixing 5 5 mm assumes that the fixing penetrates the whole insulation layer Page 11 of 24 Table 8 Steel frame approximate wall U values 218 U value IW m K StoTherm Classic Rotofix Plus Mechanical insulation systems StoTherm Classic Mechanical insulation systems MJ9 StoTherm Classic Adhesive insulation systems KJ O O O O O 19 26 28 30 35 1806 1200 1104 1104 1004 170 200 140 130 120 100 1 Wall construc on e 12 5 mm plasterboard X 0 25 W m K 150 mm sl 12 mm cel 20 mm ca Rail EPS 2 3 4 5 6 Rotofix fix system only PVC fixing number Rotofix fixings 6 m 5 mm diameter steel anchor hk 50 W m rail 0 17 W m ne insulation A 0 038 W m 7 K Rotofix green black 8 mm render A 1 W m 1 K 1 as may be required for the building regulations one 8 mm diameter stainless steel fixing n 2 1 m X 17 W m U value for the plain wall element only Three dimensional computer modelling in accordance with BS EN ISO 10211 calculated depending upon the insulation thickness used 7 10 3 When considering insulation requirements designers sho K 70 EPS supporting the national Building Regulations See to ensure an appropri
26. board with a coloured stripe indicating the grade and fire classification Table 2 EPS types Type Density Tensile strength Shear strength Shear modulus Thickness 12 kg m3 kPa N mm 1 Nemm mm 9o84 19 20 150 gt 0 02 gt l 20 200 7 09 16 17 100 20 02 gt I 20 200 1 In 10 mm increments 2 Thicknesses lt 60 mm are for use in areas such as window reveals 3 Available in white and grey 4 100 mm to 200 mm thickness for use with the StoTherm Classic Rotofix Plus Mechanical insulation systems StoTherm Classic Mechanical insulation systems M and the StoTherm Classic Adhesive insulation systems K 5 60mm to 200 mm thickness for use with the StoTherm Classic Adhesive insulation systems K 3 The systems have not been assessed for use below the dpc 1 4 Other components of the systems include Sto Glass Fibre Mesh multi stranded alkali resistant glassfibre with a polymer coating marked with the Sto logo nd weighing approximately 150 g m supplied in rolls 1 1 m wide by 50 m in length toArmor Mesh used in conjunction with Sto Glass Fibre Mesh marked with the Sto logo and weighing pproximately 490 g m toArmat Classic a ready mixed polymer based ground coat and reinforcing plaster L olit a ready mixed acrylic based textured coating al ing toSilco MP a ready mixed silicone based textured coating or receiver for dry dash finish L toSilco a ready mixed
27. bstrate or the 4 M the bearing of the insulation onto the substrate or the flexural he fixing rails and packers where used and into the substrate wall C K the bearing of the insulation through the adhesive into the s on the walls should be calculated in accordance with BS EN 1991 1 4 2005 or n should be given to locations with high wind load pressure coefficients r adhesive coverage may be necessary In accordance with BS EN 1990 2002 it is recommended that a load factor of 1 5 is used to determine the ultimate wind load to be resisted by the insulation systems 5 9 The bo buildings in nd between the reinforcement coat and insulation is adequa the UK L e fo resist negative pressures likely to occur in 5 10 Assessment of structural performance for individual buildings shall be carried out by a suitably qualified engineer n oro insulation e e thickn 5 1 The determination of the resistance to win e StoTherm groove in systems C e StoTherm her appropriately qua e substrate wall has adequate strength to resist the additional loads systems ignoring any positive contribution that may occur from the insulation systems g ess of insulation used and the nega an resist wind loads of 1500 Pa an Classic Mechanical insulation syste at a max imum of 300 mm centres indicated ified person to confirm that 4 hat may be applied
28. d prior to installation of render system Sto render stop bead Sto seal tape 2D 15 26 or 2D 15 5 12 25 ES minimum flexible sealant 85 mm minimum face of render Page 22 of 24 16 Site practice It is essential that appropriate site surveillance is in place to ensure the detailing is carried out to the correct level Additionally the installation of the insulation systems should be checked by the person supervising the works at the end of each relevant stage of the installation For further information the Certificate holder should be contacted 17 Tests An examination was made of data relating to test reports adequacy of fixing systems durability of finish e fire performance e pull out strength of the systems thermal conductivity component characterisation e heat spray cycling e resistance to freeze thaw impact resistance water vapour permeobility 18 Investigations 18 1 Calculations and reports were assessed in connection with the structural performance of the insulation systems 18 2 The practicability of installation and the effectiveness of detailing techniques were examined 18 3 The manvfacturing process the methods adopted for quality control of manufacture and boughtin components and details of the quality and composition of the materials used were examined f 18 4 An assessment of the risk of interstitial condensation was undertaken 18 5 Data generated from t
29. d 10 4 of this Certificate Requirement Regulation 7 Materials and workmanship Comment The systems are acceptable See section 12 1 of this Certificate t The Building Scotland Regulations 2004 as amended 5 Regulation 8 1 2 Fitness and durability of materials and workmanship Comment The use of the systems satisfies the requirements of this Regulation See sections 11 1 and 12 1 of this Certificate Regulation 9 Building standards construction Standard ll Structure Comment The systems can sustain and transmit wind loads to the substrate wall with reference to clause 6 203 See sections 5 8 and 5 14 of this Certificate Standard 2 6 Spread to neighbouring buildings Comment The systems incorporate materials which would not be classified as non combustible Completed walls therefore should be regarded as unprotected areas as defined in this Standard with reference to clause 2 6 41 See sections 6 1 to 6 6 of this Certificate Standard DU Spread on external walls Comment The systems incorporate materials which would not be classified as non combustible as defined in this Standard Completed walls therefore should be regarded as unprotected areas with reference to clause 2 7 1012 See sections 6 1 to 6 6 of this Certificate Standard 3 10 Precipitation Comment Walls insulated with the systems will provide a degree of protection against rain ingress and can provide satisfactory resistance
30. ed With Light Steel Framing Steel Construction Institute 2006 8 5 Additional measures shall be taken when the system is directly fixed to a sheathing board to ensure water penetration does not occur The designer should check that the windows doorsets flashings and other similar items have been specifically designed for this use Particular attention should be paid to the prevention of water ingress For example at junctions between the insulation systems and windows openings and penetration details should be designed to deflect water away from the insulation and onto the external face of the wall 8 6 Dynamic modelling of moisture transfer should be carried out in accordance with BS EN 15026 2007 especially for light steel framed constructions to help establish the likelihood of moisture accumulating within the construction over the design life of the building 8 7 At the tops of walls the insulation systems should be protected by an adequate overhang or other detail designed for use with this type of insulation systems see section 15 43 9 Risk of condensation 33 a condensation and the recommendations of BS 5250 2011 should be followed Designers should ensure that an appropriate condensation risk analysis has been carried out for all parts of a construction including at junctions between the insulation systems and windows between the adhesive where applicable and sheathing board or elsewhere on the steel f
31. essment and technical investigations carried out on StoTherm Classic External Wall Insulation Systems 3 General 3 1 The StoTherm Classic External Wall Insulation Systems are applied to the outside of external walls of masonry and dense or notines concrete constructions and timber or lightsteeHramed constructions They are suitable for use on new or existing domestic and non domestic buildings one metre or more more than one metre in Scotland from a boundary and where the floor level of any storey above the ground floor is not higher than 18 m above ground level 3 2 The systems are fixed to the external surface of the wall using the mechanical systems or adhesive The Sto EPS boards are protected by a minimum 3 mm thick reinforcement coat of StoArmat Classic containing a glassfibre reinforcement mesh which when dry is overcoated with one of the finishes listed in section 1 4 Should a dash finish be required application can only be made over StoSilco MP applied in a thickness of between 5 mm and 6 mm Page 6 of 24 Steel framed buildings 3 3 When mechanically fixed insulation systems are used on steelframed buildings incorporating vertical steel studs minimum thickness 1 2 mm minimum flange width 50 mm fixed at a maximum of 600 mm centres and sheathed with a fire rated exterior grade sheathing board see Table 3 the insulation systems are secured to the sheathing board creating a cavity between the sheathing and insulation For new b
32. he assessment resulting in the issue of Certificates 90 2433 C and 90 2460 C were used in support of this Certificate Bibliography BS 5250 2011 Code of practice for control of condensation in buildings BS 5628 3 2005 Code of practice for the use of masonry Materials and components design and workmanship BS 5950 5 1998 Structural use of steelwork in building Code of practice for design of cold formed thin gauge sections BS 6399 2 1997 loading for buildings Code of practice for wind loads BS 8000 3 2001 Workmanship on building sites Code of practice for masonry BS 8200 1985 Code of practice for design of non loadbearing external vertical enclosures of buildings BS EN 634 2 2007 Cement bonded particleboards Specification Requirements for OPC bonded particleboards for use in dry humid and exterior conditions BS EN 1990 2002 Eurocode Basis of structural design BS EN 1991 1 4 2005 Eurocode 1 Actions on structures General actions Wind actions BS EN 1993 1 1 2005 Eurocode 3 Design of steel structures General rules and rules for buildings BS EN 1996 1 1 2005 Eurocode 6 Design of masonry structures General rules for reinforced and unreinforced masonry structures BS EN 1996 1 2 2005 Eurocode 6 Design of masonry structures General rules Structural fire design BS EN 1996 2 2006 Eurocode 6 Design of masonry structures Design considerations selection of
33. his Certificate has been issued to them is valid only within the UK has to be read considered and used as a whole document it may be misleading and will be incomplete to be selective is copyright of the BBA is subject to English Law 19 2 Publications documents specifications legislation regulations standards and the like referenced in this Certificate are those that were current and or deemed relevant by the BBA at the date of issue or reissue of this Certificate 19 3 This Certificate will remain valid for an unlimited period provided that the product system and its manufacture and or fabrication including all related and relevant parts and processes thereof are maintained at or above the levels which have been assessed and found to be satisfactory by the BBA continue to be checked as and when deemed appropriate by the BBA under arrangements that it will determine are reviewed by the BBA as and when it considers appropriate 19 4 The BBA has used due skill care and diligence in preparing this Certificate but no warranty is provided 19 5 In issuing this Certificate the BBA is not responsible and is excluded from any liability to any company firm organisation or person for any matters arising directly or indirectly from ihe presence or absence of any patent intellectual property or similar rights subsisting in the product system or any other product system the right of the Certificate holder to
34. iately after application while the coating is still soft On completion the surface must be checked to ensure an even coverage of spar dash has been achieved Where necessary the aggregate should be lightly tamped to ensure a good bond 5 41 The finish coats should be allowed to dry thoroughly before any of the paint coatings covered by this Certificate are applied to any features 5 42 Continuous surfaces must be completed without a break so the coatings must always be applied to a wet edge In some instances it may not be possible to apply the render to a wet edge The position of day joints must be selected in accordance with the Certificate holder s installation instructions 5 43 At the top of the wall the insulation boards must be protected by fitting under a soffit or similar projection and be sealed using StoSeal Tape or appropriate StoSeal beads see Figure 8 Figure 8 Typical wall top parapet detail cement or plywood board metal capping dpm ee ae StoSeal tape Page 19 of 24 15 44 Wallheads are formed by returning the reinforcing coat and reinforcement on to the horizontal surface which shall be prot surfaces For an overhanging so 15 45 Care shou 15 46 At windows and doors the insulation shou clearance New buildings
35. ints and PVC packers Starter and holding tracks are fastened to substrates with Sto approved hammerdrive or screw fixings StoTherm Classic Adhesive insulation systems K square edge or tongue and groove insulation boards of size 1000 mm by 500 mm 2 bonded to the substrate with a minimum of 40 adhesive coverage and supplementary mechanical fixings using one of t Stolevell Uni a polymer based powder adhesive containing cement for mixing with clean water Sto Baukleber ADH B a powder adhesive containing cement for mixing with clean water Sto dispersion adhesive a ready to use organically bound adhesive for level substrates use with EPS insulation Sto Turbofix 4 a singlecomponent polyurethane foam adhesive fo nformation on other board sizes can be obtained from the Certificate holder The tongues and grooves must be at least 12 mm wide and 15 mm deep and at least 17 5 mm from the board edge Details of the use of the systems without supplementary fixings can be obtained from the Certificate holder For use with EPS with a tensile strength of 150 kPa shear strength of gt 0 02 N mm and shear modulus of 1 N mm 2 Three types of expanded polystyrene insulation boards are used with the systems see Table 2 The boards are classified as Euroclass E in relation to fire in accordance with BS EN 13501 1 2007 Each pack is marked with the manufacturer s name and each
36. l insulation systems are not affected by the maximum deflections permitted in the design of steeHrame structures to BS EN 1993 1 1 2005 and BS 5950 5 1998 ie span 300 Mid span deflections should not be greater than span 300 Deflection should be limited where possible to minimise damage to the insulation systems 5 15 It is essential that the appropriate movement joints are incorporated into the construction to accommodate the differential movement for example movement and contraction due to variation of temperature and moisture content This is to ensure substrate movement does not damage the insulation system 5 16 The designer should ensure that firebreaks used with the system are fixed adequately to resist the anticipated wind loading Impact loading 5 17 The systems are suitable for use 1 5 m above pedestrian or floor level in areas accessible primarily to those with a high incentive to exercise care or areas with only a small chance of accidents or misuse occurring location category C as defined in BS 8200 1985 Table 2 For areas likely to be prone to greater impacts the advice of the Certificate holder should be sought 6 Behaviour in relation to fire General A A The surface spread of flame classification of the external surface of the system is given in Table 6 5 Table 6 Surface spread of flame performance Maximum declared organic content of the Minimum declared flame retardant of the Euroclass
37. lation is to be avoided and the full thermal benefit obtained from the insulation systems 3 8 The systems will improve the weather resistance of a wall and provide a decorative finish However they may only be installed where other routes for moisture penetration have been dealt with separately and effectively and where there are no signs of dampness on the inner surface of the inner leaf of the wall other than those caused by condensation The systems can be used to overcome condensation associated with the internal wall surface 3 9 Buildings should have wall surfaces in accordance with section 14 Site survey and preliminary work in the Installation part of this Certificate 133 equirements should be constructed in accordance with the relevant recommendations of e BS EN 1996 1 1 2005 BS EN 1996 1 2 2005 BS EN 1996 2 2006 and BS EN 1996 3 2006 e BS 5628 3 2005 with particular reference to Clause 5 5 Exclusion of water e BS EN 1993 1 1 2005 Eurocode 3 and the relevant parts of this Certificate O BS 8000 3 Z001 1 And other parts where appropriate 4 3 10 New walls subject to the national Building Regulations and other new buildings not subject to regulatory 3 11 It is essential that movement joints are used through the insulation systems to ensure all substrate movement is not transferred to the insulation system and is managed in a such a way that damage to the insulation systems does not occ
38. manufacture supply install maintain or market the product system individual installations of the product system including their nature design methods performance workmanship and maintenance any works and constructions in which the product system is installed including their nature design methods performance workmanship and maintenance any loss or damage including personal injury howsoever caused by the product system including its manufacture supply installation use maintenance and removal any claims by the manufacturer relating to CE marking 19 6 Any information relating to the manufacture supply installation use maintenance and removal of this product system which is contained or referred to in this Certificate is the minimum required to be met when the product system is manufactured supplied installed used maintained and removed It does not purport in any way to restate the requirements of the Health and Safety at Work etc Act 1974 or of any other statutory common law or other duty which may exist at the date of issue or reissue of this Certificate nor is conformity with such information to be taken as satisfying the requirements of the 1974 Act or of any statutory common law or other duty of care British Board of Agr ment tel 01923 665300 Bucknalls Lane fax 01923 665301 Garston Watford e mail mail amp bba star co uk Herts WD25 9BA website www bbacerts co uk Page 24 of 24
39. name and product identification Each board is identified with a coloured stripe indicating the grade and fire classification 2 2 The insulation boards must be stored on a clean firm level base and protected from prolonged exposure to sunlight Open packs should be protected either by storing under cover or recovering with opaque polythene sheeting The boards must not come into contact with solvents or bitumen products nor be exposed to open flame or other ignition sources Care must be taken when handling the insulation to avoid damage Damaged insulation boards should be separated and not used 2 3 All bagged products should be stored in dry conditions off the ground and protected from moisture All render products must be protected from excessive heat and frost 2 4 Components are delivered in the containers and quantities listed in Table 3 Each container carries the product identification Table 3 Component supply details Component Packaging and quantity size Standard reinforcing mesh roll 1 1 m by 50m Sto Armor mesh roll 1 m by 25 m Sto TurboFix adhesive pressurised bottle 10 4 kg and 750 ml can Sto cementitious adhesive iriplelined bag 20 25 kg Coatings pail 15 litre Primer cementfree reinforcing coats and renders plastic pail 23 25 kg 2 5 Sto Turbofix adhesive should be stored at temperatures between 15 C and 25 C Assessment and Technical Investigations The following is a summary of the ass
40. nd alterations made to underground drainage to accommodate its repositioning on the finished face of the insulation systems 14 8 Internal wet work eg screeding or plastering shall be completed and allowed to dry prior to the application of the insulation systems 15 Procedure General 5 1 Application of StoTherm Classic External Wall Insulation Systems is carried out in accordance with the Certificate holder s instructions 5 2 Application of coating materials shall not be carried out on damp substrates if rain is expected at temperatures below 5 C or above 30 C or if exposure to frost is likely The coating shall be protected from rapid drying Weather conditions therefore should be monitored to ensure correct curing conditions 5 3 All rendering should be in accordance with the relevant recommendations of BS EN 13914 1 2005 5 4 Insulation boards can be cut on site using a fine toothed saw or a hot wire cutter Care must be taken to ensure the surface of the insulation boards is not damaged See Certificate holder for details Page 13 of 24 Movement joints 15 5 Movement joints should be included where required For example if a movement joint is incorporated in the substrate a movement joint must be provided in the insulation systems 15 6 Movement joints extend through the full insulation systems and are made using Sto profiles E or V see Figure 2 or sealed with an movement joint sealant against a backer rod 1
41. once the fixing has been installed and adjusted 5 13 The boards shall be butted tightly together with the vertical joints staggered by a minimum of 100 mm and any open joints in the insulation systems filled with slivers of insulation board or Sto PU foam Generally insulation boards overlap at the corners of buildings see the Certificate holder for details High spots or irregularities should be removed by lightly planing with a rasp over the entire surface to provide a key for the reinforcing coat 15 14 Packing shims are used at fixing points behind the starter tracks where it is necessary to overcome surface irregularities and maintain alignment of the face of the insulation StoTherm Classic Mechanical insulation systems M 15 15 For installation beginning at the base of the wall the Sto aluminium starter track is used to mount the first row of boards For installations commencing at firsHfloor level either the Sto aluminium or Sto PVC U Starter Tracks may be used Both profiles are fixed to the substrate with Sto hammerdrive fixings or screws with a fixing at each end of the track fixings must accommodate the thermal expansion of the track ata maximum of 300 mm centres see Figure 4 Care must be taken not to overdrive the fixings Page 14 of 24 Figure 3 Typical section at base level and Rotofix detail nominal 20 mm drainage cavity EHBHUSSBHI sheathing board on insulation board
42. rame and at other openings and penetrations to ensure condensation does not occur at the surface or within This should take into consideration the effect of any cavities included within the construction 4 1 When using the systems consideration must be given to the overall design to minimise the risk of 9 2 Dynamic modelling of the condensation risk should be carried out to help establish the likelihood of moisture accumulating within the construction over the design life of the building See section 8 6 9 3 The water vapour resistivity for the base coat with the render finishes is not more than 2000 MN s g m 9 4 The resistivity of the EPS insulation boards can be taken as 300 MN s g m 9 5 Internal wet work eg screeding or plastering shall be completed and all the construction moisture be allowed to dry prior to application of the systems Page 10 of 24 Surface condensation 7 9 6 Walls will adequately limit the risk of surface condensation when the thermal transmittance U value does not exceed 0 7 W m K at any point and the junctions with other elements and openings comply with section 10 4 not exceed 1 2 W m K at any point See BS 5250 2011 Section 8 and BRE Report BR 262 2002 for Bu Walls will adequately limit the risk of surface condensation when the thermal transmittance U value does additional information Interstitial condensation condensation when they are designed and construc
43. s the horizontal intermediate tracks are installed into the grooves at the top edges The intermediate tracks are fastened to the substrate with SS hammerdrive fixings or screws at maximum 300 mm centres Subsequent rows of boards a 15 19 The boards shall be butted tightly toget re installed using the same procedure her with the vertical joints staggered by a minimum of 200 mm and any open joints in the insulation systems must be filled with slivers of insulation board or Sto PU foam Generally insulation boards overlap at the corners of buildings see the Certificate holder for details Any high spots or irregularities should be removed by lightly planning with a rasp over the entire surface to provide a key for the reinforcing coat 15 20 Packing shims are used at fixing points surface irregularities and maintain a level face behind the starter and holding tracks where it is necessary to overcome StoTherm Classic Adhesive insulation systems K 15 21 Stolevell Uni adhesive is prepared by mixing 6 to 7 litres of clean water with every 25 kg bag 15 22 Installation begins at the base of the wall above the dpc at a distance sufficient to prevent the bridging of the dpc A firm horizontal support either the Sto a luminium profile or a temporary timber batten is used to mount the first row of boards The aluminium profile is installed as previously described see Figure 4 15 23 If
44. should be used where required As with all inst the dowel performance in these substrates allations using mechanical fixings pull out testing shall be used to verify 15 27 For fixing Sto TurboFix adhesive system s the substrate shall be level loadbearing dry clean and free from efflorescences and separating agents The air and substrate temperature shall not be less than 5 C nor more than 30 C Substrate unevennesses of up to approx 20 mm may be equalised using Sto TurboFix and supplementary mechanical fixings Unevenness greater than 20 mm will require a different fixing method 15 28 The bottle containing the adhesive foam should be shaken thoroughly 20 to 30 times at the beginning of works and again after each successive 1 to 2 temperatures above 50 C 15 29 The TurboFix foam adhesive is applied hours The material should be protected against direct sunlight and to the face of the insulation board in a continuous line around the perimeter of the board with additional lines of adhesive in an enclosed M or W shape over the remaining surface see Figure 6 The adhesive pattern must ensure an even adhesive covering of greater than 40 15 30 The insulation board coated with Sto Turbofix shall be applied to the wall immediately after application of the adhesive foam 15 31 The boards shall be pressed gently in place against the wall and butted tightly together working from bottom to top with the
45. sic External Wall Insulation Systems see Figure 1 are of three types e StoTherm Classic Rotofix Plus Mechanical insulation systems tongue and groove expanded polystyrene EPS boards of size 1000 mm by 500 mm 21 fixed to the substrate with a fixing incorporating a rotating spiral load transfer plug and the relevant supplied fixing pin The fixing is embedded into the insulation and the helical shape allows for adjustment to be made to the plane of the surface of the insulation boards There are two types of fixings depending on the cavity width required see Table 1 1 Information on other board sizes can be obtained from the Certificate holder 2 The tongues and grooves must be at least 12 mm wide and 15 mm deep and at least 17 5 mm from the board edge Page 3 of 24 1 2 3 4 l Table 1 Sto Rotofix Plus fixing and desired cavity width Fixing Cavity width mm Sto Rotofix Plus Green 120T E1 10 to 30 Sto Rotofix Plus Black 160T E 1000 10 to 70 1 Not suitable for use with insulation 130 mm unless the cavity width is gt 30 mm see Certificate holder for details StoTherm Classic Mechanical insulation systems M grooved slotted expanded polystyrene EPS boards of size 500 mm by 500 mm fixed to the substrate with an unplasticised polyvinyl chloride PVC U or aluminium track system comprising horizontal starter tracks intermediate tracks intermediate tracks cut and fixed into vertical board jo
46. systems are suitable for use on buildings up to 18 m high see section 6 Risk of Condensation the insulation systems can contribute to limiting the risk of surface and interstitial condensation see section 9 Thermal performance the system can be used to improve the thermal performance of external walls and contribute to meeting the Building Regulations requirements see section 10 Durability with appropriate care the insulation systems should remain effective for at least 30 years see section 12 00 line The BBA has awarded this Agr ment Certificate to the company named above for the product system described herein This product system has been assessed by the BBA as being fit for its intended use provided it is installed used and maintained as set out in this Certificate On behalf of the British Board of Agr ment one lini LL Date of First issue 8 May 2012 Sean Moriarty Head of Approvals Greg Cooper Originally certificated on 19 October 1995 Energy and Ventilation Chief Executive The BBA is a UKAS accredited certification body Number 113 The schedule of the current scope of accreditation for product certification is available in pdf format via the UKAS link on the BBA website at www bbacerts co uk Readers are advised to check the validity and latest issue number of this Agr ment Certificate by either referring to the BBA website or contacting the BBA direct British Board of Agr ment tel 01923 66530
47. t see Figure 9 the detailing of the insulation systems around openings and projections see Figure 10 d be continued around the reveals where there is sufficient d be built to allow this Where there is insufficient clearance the reinforcement coat and render decorative finish should be continued into the reveal The reveal should be insulated ive an elastic joint using StoSeal nsulation should be fitted around al wall insulation system and shed ng with stooled ends StoSeal and around the stooled ends 5 49 Window door reveals and heads are sealed using the Sto Stopseal Bead a PVC bead incorporating integral g strip to help protect other fin e bead cannot be installed inage cavity a PVC channel is gle of not less than 10 from the the opening The drainage channel will deflect any water present in the pitched roofs the sheathing board This channel is screwfixed to the substrate at 300 mm centres see Figures 11 vely fixed to the substrate at the appropriate rate using a suitable method For further bed adhesive injected through insulation iy StoSeal Tape intermediate tracks Page 20 of 24 Figure 1O Typical details at reveals T c ab StoSeal tape jE EPS bonded to substrate cavity fire stop
48. t eaves e dpc level exact position of movement joints if required areas where exterior grade sealants must be used location and type of weather seals to be used location of water deflection channels see Figure 1 1 alterations required to external plumbing position of fire barriers 4 2 The suitability of the construction for the installation of the insulation systems shall be determined as part of the preinstallation survey 4 3 All necessary repairs to the building structure shall be completed before installation of the insulation systems commences 4 4 Surfaces shall be sound clean and free from loose material The flatness of surfaces shall be checked and any excessive irregularities made good prior to installation to ensure that the insulation boards are installed with a smooth in plane finished surface Q 4 5 Where surfaces are covered with an existing rendering it is essential that the bond between the background and the render is adequate All loose areas shall be hacked off and reinstated appropriately and adequately If the adhesive bond strength is determined not to be sufficient one of the mechanical fixing systems should be used with a supplementary adhesive 4 14 6 On existing buildings purpose made sills shall be fitted to extend beyond the finished face of the insulation systems New buildings shall incorporate suitably deep sills 14 7 Where appropriate external plumbing shall be removed a
49. ted in accordance with BS 5250 2011 Section 8 and Annex D Care shall be taken to ensure the building is adequately sealed and remains adequately sealed and ventilation is in place to help prevent condensation forming on the internal face of the sheathing board or the surface of the steel frame 4 Weathertight walls incorporating the insulation systems will adequately limit the risk of interstitial 9 9 If the insulation systems are to be used on the external walls of rooms expected to have continuous high humidities care shall be taken in the design of the rooms to avoid the formation of surface and interstitial condensation 9 10 A wall shall be constructed to have resistance against water vapour ingress The incorporation of a cavity within a construction will help any water vapour reaching the cavity to dissipate The designer should make provision for this ensuring that any condensate which may form can drain freely to the outside of a wall construction 10 Thermal performance 10 1 Calculations of the thermal transmittance U value including the effect of any cavity within the gt construction should be carried out in accordance with BS EN ISO 6946 2007 BRE Report BR 443 2006 Conventions for U value calculations and where required BRE Digest BR 465 2002 U values for light steel frame construction using the declared thermal conductivity Nevea value W m K of e K7O EPS 0 038 W m K e K90 EPS 0 034 W m
50. tem 15 16 Where the render insulation systems will be returned to the wall a strip of mesh is partially adhered so that 200 mm plus the thickness of insulation of it is hanging from the starting line For installation onto steel framed buildings the mesh is attached to the PVC starter track once it is in position Sto Armat Classic is subsequently used to wrap the overhanging mesh around the profile and adhere it to the first course of insulation boards All exposed insulation board edges are protected in this manner see Figure 5 1 Details for systems which do not require drainage can be obtained from the Certificate holder Figure 5 Typical sections at first floor level mesh wrapped behind system Page 16 of 24 15 17 For installations onto masonry walls wh ere the render insulation systems will not be returned to the wall the Sto Starter Track is fixed along the starting line on top of the adhered mesh the mesh is attached to the starter track for steeHramed buildings The shims are positioned and perforated starter track used where a drainage cavity is required The insulation boards are inserted aligning the track flanges with the board grooves and installing an appropriately sized 400mm minimum length intermediate track fixed vertically with a minimum of 2 fixings between each board Packing shims are used to maintain alignment 15 18 After positioning the first row of board
51. to water penetration with reference to clauses 3 10 102 and 3 10 2023 See sections 3 10 and 8 3 of this Certificate Standard al Condensation Comment Walls insulated with the systems will contribute to minimising the risk of interstitial and surface condensation with reference to clauses 3 15 12 3 15 4012 and 3 15 5 ll2 See sections 9 1 and 9 7 to 9 10 of this Certificate Standard 6 1 b Carbon dioxide emissions Standard 6 2 Buildings insulation envelope Comment The systems can contribute to satisfying these Standards with reference to clauses 6 1 10 6 1 22 OLIH 1 52 1M 22 NMA 5 2 III 55 2 422 6 2A 85 22 AME DIA 6 27 COIT 6 2 1002 6 2 1 101 6 2 1201 and 6 2 13 See sections 10 1 and 10 4 of this Certificate 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic 42 The Building Regulations Northern Ireland 2000 as amended 2 Regulation B2 Fitness of materials and workmanship Comment The systems are acceptable See section 12 1 of this Certificate Regulation B3 2 Suitability of certain materials Comment The systems are acceptable See section 11 1 of this Certificate Page 2 of 24 Regulation CA b Resistance to ground moisture and weather Comment Walls insulated with the systems provide a degree of protection against rain ingress and therefore contribute to satisfying this Regulation See sections 3 10 and 8 3 of this Certificate Regulation
52. uild domestic constructions intended to be covered by NHBC guarantee a drained cavity of nominal 20 mm width must be provided Timber framed buildings 3 4 Timberframed buildings should be sheathed and designed in accordance with BS EN 1995 1 1 2004 and BS EN 1995 1 2 2004 Eurocode 5 The system must incorporate an appropriate 20 mm nominal wide vented and drained cavity 3 5 The minimum specification of sheathed steelframed construction on which the insulation systems can be installed is given in Table 4 Table 4 Sheathed steel framed construction minimum specification Item Characteristic Standard or dimension mm Steelwork Standard BS EN 10326 2004 Grade and coating Type S 320 GD Z275 Thickness 1 2 BS EN 6342 2007 Sheathing board fire rated Type Thickness 12 3 6 Mechanical fixings are used with the Sto Mechanical system and supplementary mechanical fixings are used with the adhesive insulation systems especially during the strength development phase of the adhesive curing Care should be taken to ensure appropriate fixing on all substrates The Certificate holder can give guidance on the use of the systems without mechanical fixings 3 7 The systems are effective in reducing the thermal transmittance U value of the walls in new and existing buildings It is essential that the detailing techniques specified in this Certificate are carried out to a high standard if the ingress of water into the insu
53. ur Designers must ensure the sheathing boards are adequately restrained an appropriate number of movement joints are used carried through the construction where required 3 12 When using the systems consideration must be given to the overall design to minimise the risk of condensation and the recommendations of BS 5250 2011 should be followed 3 13 The fixing of rainwater goods satellite dishes clothes lines hanging baskets and similar items is outside the scope of this Certificate 3 14 The effect of installation of the system on the acoustic performance of a construction is also outside the scope of this Certificate 3 15 It is essential that the insulation systems are installed and maintained in accordance with the conditions set out in this Certificate 4 Practicability of installation The systems should only be installed by installers who have been trained and registered with the Certificate holder see section 13 Page 7 of 24 5 Strength and stability General 5 1 The systems can be designed to provide adequate resistance to design wind loads applicable in the UK The actual resistance to wi nd loads will depend upon the wall construction and insulation system used 5 2 Provided the substrate is suitable see section 3 5 the fixings will effectively transfer the selfweight of the render insulation systems to the substrate 5 3 The self weight of the insula rn ion systems incl uding the render and
54. with the tongue edges of the insulation boards aligned to the top and left of the board 15 10 Ifa temporary timber batten is to be used a strip of mesh is partially adhered to the wall so that 200 mm plus the thickness of the insulation is hanging from the starting line of the insulation The cavity must be filled using PU foam at the base to fill the gap the excess foam must be trimmed away StoArmat Classic is used to wrap the overhanging mesh around the lower edge and adhere it to the first row of insulation boards All exposed edges of the insulation boards are protected in this manner see Figure 4 5 11 Once a row of insulation boards has been positioned holes are drilled in the insulation to suit the required fixing pattern The spiral load transfer plug is installed into the insulation using the appropriate tools The Rotofix fixings are placed not less than 1 20 mm from the edge of the insulation boards in a fixing pattern that maintains the minimum number of fixings per square meter Once positioned holes are drilled through the plugs into the substrate and fixing pins fitted fixing the boards to the substrate Circular recesses are cut into insulation boards before the spiral load transfer plug is inserted 5 12 After the insulation boards have been secured to the substrate the spiral load transfer plug can be rotated to adjust the line of the surface of the insulation An EPS blank or PU foam shall be used in the recess
55. y which employs operatives who have been trained by the Certificate holder to install the insulation systems and who upon completion of their training have been issued with an appropriate identification card or certificate by the Certificate holder has undertaken to comply with the Certificate holder s application procedure including the requirement for each application team to include at least one member with an identification card or training Certificate is subject to audits by the Certificate holder including site inspections 14 Site survey and preliminary work 14 1 It is essential that the substrate is weathertight before the installation of the insulation systems A pre installation survey of the property shall be carried out to determine whether repairs are required to the building structure sheathing board or steel frame The survey shall include tests and an assessment and recommendation on the type and number of fastenings required in respect of the building s expected wind loading The installer shall prepare a specification for each project in accordance with the Certificate holder s requirements covering each elevation of the building and with details indicating position of tracks e number and fixing pattern for Sto Rotofix Plus fixings position of starter profile or starter mesh reinforcing mesh es for adhesively fixed insulation systems e detailing around windows doors and a
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