BBA Certificate
Contents
1. EPS packer stop track back flashing tape drainage deflection bead sealed to tal can flashin wall with compatable sealant Pea p g I 7 insulation board vy wae R ve s I 40 mm minimum mn 4 lt ie breather membrane y 4 a H sealant li reinforcing mesh i 4 holding track seas X gt H in base coat pe AR 3 breather oe 2 holding track used l membrane i 5 as vertical supports reinforcing mesh e Shim LY i embedded ai 5 in base coat t 7 l OR flashing eto packing shim a N Y Drwitfinsh OL J m finish N je insulation board EPS packer with ooo 20 mm gap2. fi mesh embedded in base coat yt L reinforcing mesh embedded in base coat L mineral wool lamella fire break intumescent strip Page 12 of 16 Basecoat 15 14 Sealant is applied to the primed basecoat where required and seals or a bead of sealant 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 15 The Genesis base coat should be mixed to disperse the ingredients before Portland cement is added in a ratio ot 1 1 by weight in small quantities and mixing thoroughly each time Care should be taken not to overmix 15 16 A skim of base coat is applied over the surfaces of the boards to receive the Standard Plus reinforcing mesh which is embedded in the base coat A second layer of base coat is applied to fully encapsulate the mesh Reinforcement 15 17 Where the heavy duty mesh is required a thick layer of base coat is applied over the surface of the boards to receive the heavy duty mesh The drying period for any render will depend on weather conditions however the base coat with heavy duty mesh embedded should be allowed to dry for at least 24 hours before application of a second layer of base coat the Standard Plus mesh should be embedded in the second c
3. Figure 5 Typical fire break detail adhesive sheathing board 100 mm to 200 mm intumescent strip fire and moisture resistant sheathing board insulation board shim termination track 1220 300 a 300 Dryvit finish 100 200 mineral wool fire stop plan of rear part all dimensions in mm insulation board shims lt i d Ley Ole Er sheathin ee DRS g GS SER OY 9ang board D s La A 2 eters pe Q A AA l a D B PANN p SX SE a 4 gt A a A S AES H P A ienee BEX nese slab E F fi d Ea pa nee eT Z RR a AL A 100 mm 200 mm e Fspline pine Rie L Dryvit finish reinforcing mesh embedded in base coat fastener fire stop Detail mesh embedded in base coat mineral wool lamella 100 mm to 200 mm
4. 15 mm cavity with the tire break described in section 15 13 were testedl2II3 in accordance with BS 8414 2 2005 The system see section 17 4 met the requirements of BRE Digest 501 2007 BR 135 Annex B Performance criteria and classification method for BS 8414 2 2005 This relates to the requirement for fire barriers to limit the risk of fire spread between floors in buildings subject to the national Building Regulations Guidance concerning this is given in BRE report BR 135 2007 Fire Performance of External Insulation tor Walls of Multi storey Buildings 1 The Certificate holder holds an LPCB certificate No 784b relating to the product applied to a lightweight steel frame covering an insulation thickness range from 50 mm to 250 mm with a drainage cavity of 15 mm 2 The test performance described above was achieved using a fire barrier construction that incorporated intumescent material Whilst a construction incorporating this product met these requirements it has not been assessed by the BBA The building designers need to satisty themselves that when specified for use in a particular construction these types of components have appropriate performance and durability 3 The tire performance of other constructions should be confirmed by a fire expert from a United Kingdom Accreditation Service UKAS accredited tire test house 6 5 The tire resistance performance of a wall incorporating the system is outside the scope of t
5. 2 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic 8 2 The system has been assessed for use in sheltered areas system The insulation system should only be installed where there are no signs of dampness on the inner surtace In all cases care should be taken to ensure that walls are weathertight prior to application of the insulation of the substrate other than those caused solely by condensation 8 4 Where used the sheathing board substrate must 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 system with a drainage cavity can be seen in SCI Publication P343 Insulated Render System Used With Light Steel Framing Steel Construction Institute 2006 8 5 The designer should check that the windows doorsets tlashings 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 system and windows openings and penetration details should be designed to detlect water away from the insulation and onto the external face of the wall 8 6 At the tops of walls the insulation system should be protected by an adequate overhang or other detail designed for use with this type of insulation system see Figure 7 Page 7 of 16 9 Risk of condensation condens
6. Render finishes and reinforcement e Genesis Adhesive Basecoat latex emulsion containing aggregate and coalescing and thickening agents Mixed on site with Portland cement in the ratio ot 1 1 by weight and can be used as either a base coat or an adhesive e Dryvit Standard Plus Mesh a woven polymer coated reinforcing glassfibre mesh of nominal weight 210 g m and width 1 22 m e Dryvit Detail Mesh a woven polymer coated reinforcing glassfibre mesh of nominal weight 14 5 g m and width 240 mm e Dryvit Corner Mesh a woven polymer coated glassfibre mesh of nominal weight 320 g m supplied in sections to be titted at corners when required e Dryvit Primer with Sand pigmented acrylic emulsion primer containing fine sand and coalescing agents Dryvit PMRB finish Quarzputz acrylic based emulsions containing aggregate and coalescing and thickening agents Page 3 of 16 Ancillary components for render e standard profiles for wall base end stop corner mesh and expansion joint e Dryvit corner bead with mesh a woven polymer coated glassfibre mesh adhered to a perforated 90 PVC corner bar Ancillary components used with the system but outside the scope of this Certificate e breather membrane covered by a BBA Certificate and used between the substrate s sheathing board and the rail system Used when required on steeltramed walls and in every case on timber tramed walls e sealant low modulus sil
7. S A See sections 9 1 9 Zand 9 6 too ot this Ceniticaie Standard 6 1 b Carbon dioxide emissions OZ Buildings insulation envelope Comment The system can contribute to satisfying these Standards with reference to clauses 6 2 02 6 2 41 and 6 2 5 21 See sections 10 2 and 10 4 of this Certificate 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic 4 The Building Regulations Northern Ireland 2000 as amended 5 Regulation B2 Fitness of materials and workmanship Comment The system is acceptable See section 12 1 and the Installation part of this Certificate Regulation B3 2 Suitability of certain materials Comment The system is acceptable See section 11 1 of this Certificate Regulation CA4 b Resistance to ground moisture an weather Comment Walls insulated with the system can satisfy this Regulation See sections 8 3 to 8 5 of this Certificate Regulation C5 Condensation Comment Walls insulated with the system can satisfy the requirements of this Regulation See sections 9 1 9 2 and 9 9 to 9 11 of this Certificate Regulation D1 Stability Comment The system can sustain and transmit wind loads to the structural frame See sections 5 5 and 5 10 of this Certificate Page 2 of 16 Regulation E5 a External fire spread Comment The system can satisfy this Regulation See sections 6 1 to 6 6 of this Certificate Regulation F2 a i Conservation measures Comment The system can en
8. plastering External renderin BS EN 13914 2 2005 Design preparation and application of external rendering and internal plastering Design considerations and essential principles for internal plastering BS EN ISO 6946 2007 Building components and building elements Thermal resistance and thermal transmittance Calculation method ETAG O04 2000 Guideline for European Technical Approval of External Thermal Insulation Composite Systems with Rendering ETAG 014 2000 Guideline for European Technical Approval of Plastic Anchors for fixing of external thermal insulation composite systems with rendering MOAT No 22 1988 UEAtc Directives for the Assessment of External Insulation Systems for Walls Expanded Polystyrene Insulation Faced with a Thin Rendering Page 15 of 16 Conditions of Certification 19 Conditions 19 1 This Certificate e relates only to the product system that is named and described on the front page e is granted only to the company firm or person named on the front page no other company firm or person may hold or claim any entitlement to this Certiticate e is valid only within the UK e has to be read considered and used as a whole document it may be misleading and will be incomplete to be selective e is copyright of the BBA e is subject to English law 19 2 Publications and documents referred to in this Certificate are those that the BBA deems to be relevant at the date of issue or re i
9. Applying a factor of safety of say 3 will give the design ultimate resistance eg if mean of tive 1000 N characteristic resistance 600 N and ultimate resistance 200 N e from pullthrough test data with a safety factor of 3 applied the design ultimate pullHthrough load per fixing is 150 N e the number of fixings required per square metre is found by dividing the ultimate load by the minimum of these two values ie 150 N 5 10 The system is not affected by the deflections permitted when designing steelframe structures to BS EN 1993 1 3 2006 ie span 300 Deflection must be limited to prevent damage to the insulation system and the Certificate holder s advice sought 5 11 The designer should ensure that the fire break used with the system is fixed adequately to resist the anticipated wind loading 5 12 It is essential that the appropriate movement joints and expansion joints are incorporated into the construction to accommodate the differential movement for example expansion and contraction due to variation of temperature and moisture levels between elements of the substrate see section 14 This is to ensure substrate movement does not damage the insulation system Impact loading 5 13 The system is suitable tor 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 E as defin
10. Dryvit UK Ltd APPROVAL Unit 4 INSPECTION Wren Park BA CERTIFICATION Hitchin Road TECHNICAL APPROVALS FOR CONSTRUCTION Shefford Bedfordshire SG17 5D Agr ment Certificate Tel 01462 819555 Fax 01462 819556 e mail ukenquiries dryvit com 98 3548 website www dryvit co uk Product Sheet 3 DRYVIT EXTERNAL WALL INSULATION SYSTEM OUTSULATION RAIL SYSTEM This Certiticate relates to the Outsulation Rail System a railtixed external wall insulation system employing EPS insulation and a reintorced acrylic render finish incorporating a glassfibre mesh It is for use above the dpc on new or existing domestic and non domestic timber or lightweightsteeHramed buildings sheathed with a suitable exterior grade sheathing board AGREMENT CERTIFICATION INCLUDES e factors relating fo compliance with Building Regulations where applicable e factors relating to additional non regulatory information where applicable independently veritied 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 a correctly designed system will have adequate resistance to wind loads and in certain applications impact damage see section 5 Behaviour in relation to fire expanded polystyrene is combustible and will require certain measures to be taken The system with different insulati
11. able a wall to meet this Regulation See sections 10 2 and 10 4 of this Certificate Regulation F3 2 Target carbon dioxide Emissions Rate Comment The system can contribute to a building satistying its target emission rate See sections 10 2 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 storage 2 4 of this Certiticate Non regulatory Information NHBC Standards 2011 NHBC accepts the use of the Outsulation Rail System when installed and used in accordance with this Certificate in relation to NHBC Standards Chapter 6 10 Light steel framed walls and floors General This Certificate relates to the Outsulation Rail System an external wall insulation system employing EPS insulation and a reinforced acrylic render finish incorporating a glassfibre mesh for use on e sheathed lightweight steeltramed structures the system incorporates specific reinforced renders and when correctly installed will create a 15 mm nominal wide drainage cavity timber tramed constructions a breather membrane must be secured to the sheathing and an appropriate cavity created with a nominal width of 20 mm The system can be used on new and exist
12. ach building taking into consideration such factors as the building location and height Necessary repairs should be effected immediately and the sealant at joints at window and door trames replaced whenever required 11 2 The designer should ensure suitable access is available to enable maintenance inspections to take place safely 11 3 Damaged areas must be repaired using the appropriate components and the procedures detailed in the Certificate holder s technical literature The Certificate holder should be consulted on the appropriate measures for a particular installation 11 4 The finishes may become soiled in time the rate depending on the product chosen initial colour the degree ot exposure level of atmospheric pollution and the design and detailing of the wall The Certificate holder s advice should be sought for the restoration of the surface finish 12 Durability Uy 4 12 1 The system should remain effective for at least 30 years provided any damage to the surface finish is gt repaired immediately and regular maintenance is undertaken see section 1 12 2 The finish may become discoloured with time the rate depending on the initial colour the degree of exposure and atmospheric pollution as well as the design and detailing of the wall In common with traditional renders dependent upon pigment colour and type discoloration by algae and lichens may occur in wet areas 12 3 Render containing cement may be subject to l
13. all construction will depend on the selected insulation thickness the degree of ventilation to the cavity the fixing method and the insulating value of the substrate and its internal finish Example U values for a steeltramed construction with an unventilated cavity are given in Table 4 Table 4 Insulation thickness required to achieve some typical design values U value Insulation thickness W m2 K mm 0 19 200 0 26 150 0 28 140 0 30 130 1 Wall construction 150 mm steel C sections with 50 mm flanges A 50 W mre K 1 12 mm cement particle board A 1 W me K 20 mm wide cavity spacer A 0 17 W mr K 1 unventilated drainage cavity BS EN ISO 6946 2007 PVC fixing rail A 017 W m7 K1 5 mm diameter steel anchor A 50 W m K 1 EPS insulation A 0 038 W m K 1 8 mm render A 1 W m K 1 one 8 mm diameter stainless steel fire fixing A 50 W me K 2 Based on calculations in accordance with BS EN ISO 6946 2007 and three dimensional computer modelling in accordance with BS EN ISO 10211 2007 3 Plain wall U values only 4 Based upon incremental insulation thicknesses of 10 mm 10 3 When considering insulation requirements designers should refer to the detailed guidance given in documents supporting the national Building Regulations Page 8 of 16 7 amp between elements and openings Detailed guidance for junctions and on limiting heat loss by air infiltration can be
14. ation and the recommendations of BS 5250 2002 should be followed the values given in sections 9 4 and 9 5 may be used 9 2 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 system windows and the sheathing board and the structural frame and at other openings and penetrations to ensure condensation does not occur at the surface or within 4 When using the system consideration must be given to the overall design to minimise the risk of 9 3 Dynamic condensation modelling can be carried out for lightsteeltramed constructions to help establish the likelihood of moisture accumulating within the construction over the design life of the building 9 4 The equivalent air thickness of 2 4 mm of the basecoat applied to the insulation is 0 08 m 9 5 The resistivity of the EPS insulation boards can be taken as 300 MNs g7 m 9 6 Internal wet work eg screeding or plastering should be completed and allowed to dry prior to the application of a system Where this is not possible appropriate alternative means of continuous ventilation must be used to ensure the removal of construction moisture Surface condensation 47 9 7 Walls will adequately limit the risk of surface condensation when the thermal transmittance U value does not exceed 0 7 W mr K at any point and the junctions with other elements and openings comply with se
15. bility of materials and workmanship Comment The system can contribute to a construction meeting this Regulation See sections 11 1 and 12 1 and the Installation part of this Certiticate Regulation 9 Building standards construction Standard Ld Structure Comment The system can sustain and transmit wind loads to the structural frame See sections 5 5 and 5 10 of this Certificate Standard 26 Spread to neighbouring buildings Comment The system has a low risk surface classification The system incorporates insulation which would not be classed as non combustible Completed walls therefore would be regarded as unprotected areas with reference to clauses 2 6 12 2 6 202 2 6 32 2 6 Amz 2 6 5 and 2 6 6l2 See sections 6 1 to 6 6 of this Certificate Standard De Spread on external walls Comment The system incorporates insulation which would not be classed as non combustible and therefore should not be used on walls one metre or less from a boundary with reference to clauses 2 7 1012 and 2 7 2123 See sections 6 1 to 6 6 of this Certificate Standard 310 Precipitation Comment Walls insulated with the system will contribute to a construction satisfying this Standard with reference to clause 3 10 1 l2 See sections 8 3 to 8 5 of this Certificate Standard Sal Condensation Comment Walls insulated with the system can satisfy the requirements of this Standard with reference to clauses SS Ve sro 3 rane 3
16. cal layout of the base detail is shown in Figure 3 Figure 3 Base detail o i breather membrane l i ei i sheathing board l b ai Hashing ir hy l _ reinforcing mesh embedded in base coat P m Dryvit finish es f EPS packer T A a continuous flashing lt bec starter track with weep holes ee 200 mm typical finish outside scope of this Certificate oy AE S 15 11 Holding and termination tracks EPS pieces boards cut to ensure a tight fit around openings and mesh are used to ensure the insulation fits around opening details such as doors and windows Where necessary the insulation can be cut and grooved on site using tools supplied by the Certiticate holder 15 12 The layout of holding tracks around openings and the location of the drainage deflection beads is shown in Figure 4 Figure 4 Track arrangement around openings including the location of deflection beads holding track holiding track fixed vertically in place of Tspline sheathing with breather membrane Ss drainage deflection bead Tspline shims Page 11 of 16 Fire barriers 15 13 Fire barriers must be incorporated into the system where required A typical tire break detail is shown in Figure 5
17. ction 9 not exceed 1 2 W m K at any point Guidance may be obtained trom BS 5250 2002 Section 8 and BRE report BR 262 2002 Interstitial condensation AC Weathertight walls incorporating the insulation system will adequately limit the risk of interstitial Fra Walls will adequately limit the risk of surface condensation when the thermal transmittance U value does condensation when they are designed and constructed in accordance with BS 5250 2002 Section 8 and Annex D 9 10 It the insulation system is to be used on the external walls of rooms expected to have continuous high humidities care must be taken in the design of the rooms to avoid possible problems trom the formation of surface and interstitial condensation 9 11 Care must be taken to ensure the building is adequately sealed and ventilation is in place to help prevent surface condensation forming on the internal face of the sheathing board or the surface of the steel frame 10 Thermal performance 10 1 Calculations of the thermal transmittance U value must include the effect of the type of cavity included within the system see section 8 should be carried out in accordance with BS EN ISO 6946 2007 BRE Digest BR 443 2006 Conventions for U value calculations and where required BRE report BR 465 2002 U values for light steel frame construction using the declared thermal conductivity No0790 value of 0 038 W mr K 1 10 2 The U value of a w
18. ctions Figure 6 Additional reinforcement at openings insulation board reinforcing mesh wrapped around 240 mm x 300 mm Dryvit Detail mesh Dryvit reinforcing mesh placed over corner reintorcing strips 15 21 Where corners require additional impact resistance corner mesh or corner bead with mesh should be embedded into the adhesive base coat before the overall reinforced base coat is installed 15 22 The reinforced base coat should be left for a minimum of 24 hours to cure and should be hard dry and free from any irregularities eg trowel marks exposed mesh before proceeding Primer 15 23 A coat of primer is roller applied to the basecoat prior to application of the finish coat Page 13 of 16 Finishing 15 24 The finish should be thoroughly mixed taking care not to overmix It is applied directly over the base coat to a thickness appropriate to the grade Texturing of the surface can be carried out as required 15 25 Care should be taken to prevent the base and finish coats from either drying too rapidly or treezing Continuous surfaces must be completed without a break eg working to a wet edge 15 26 Care should be taken in detailing joints and seals around openings and projections At the tops of walls and around openings such as windows and doors the system should be protected by an adequate overhang and adequately sealed with a purpose made flashing see Figure 7 Figure 7 Details
19. ed 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 0 E The surface spread of flame classification of the external surface of the system is given in Table 3 The 53 amp system therefore may be used in accordance with the provisions of England and Wales Approved Document B Volume 1 paragraph 8 4 and Volume 2 paragraph 12 6 see also Volume 2 Diagram 40 Scotland Mandatory Standards 2 6 and 2 7 clauses 2 6 12 to 2 6 5 2 6 62 2 6 712 2 7 12 and 2 7 2121 respectively and Annexes 2 C and 2 E Northern Ireland Technical Booklet E paragraph 4 3 see also Diagram 4 1 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic Table 3 Surface spread of flame classification Render Classification to BS EN 13501 1 2007 PMRB Quarzputz B s2 dO 1 Basecoat Dryvit Genesis Dryvit Primer with Sand and Dryvit PMRB Quarzpulz Page 6 of 16 6 2 The insulation material is combustible and must be used in accordance with the relevant building regulations 6 3 The documents listed in section 6 1 give full details of permissible heights and boundary conditions of domestic and non domestic buildings and the relevant guidance with regard to external wall claddings of external wall insulation systems with render surfaces 6 4 The 50 mm and 250 mm systems incorporating a
20. ensation associated with the internal wall surface 3 3 The system is suitable for use on new or existing domestic and non domestic buildings one metre or more more than one metre in Scotland trom a boundary and where the floor level of any storey above the ground floor is up to and over 18 m above ground level see section 6 and can be installed on steel or timber tramed buildings with vertical studs It is essential that appropriate movement joints are incorporated into the system Steel framed buildings e the structural frame of the building is the responsibility of the building designer and is outside the scope of the Certiticate However the frame and sheathing must be designed to withstand the loads applied to it from the insulation system and give an acceptable resistance to pull out of fixings see section 5 The system must be secured to the substrate with fixings that pass through the polyamide shims to create a nominal 15 mm wide cavity between the sheathing and insulation This drainage cavity must not be vented to the outside air to an extent that would attect the thermal performance of the system Timber framed buildings e the 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 appropiate 20 mm nominal wide vented and drained cavity 3 4 Existing buildings subject to the Building Regulations should have wall surfaces in accorda
21. er s instructions 15 7 The first insulation board is positioned onto the base profile and is used to position the first horizontal holding track The holding and termination track slots into the pre cut groove in the insulation board The level is checked and the rail positioned away from the substrate using a shim It is important that the holding track and shim fits tightly and that the track locates fully into the groove in the insulation it should not be forced into position It is important to ensure the insulation boards are tightly butted together particularly attention should be made to board corners Page 10 of 16 15 8 The horizontal holding and termination tracks are fixed to the substrate with mechanical fixings at a maximum of 300 mm centres The fixings pass through the shim and into the substrate Where required tire breaks or cavity barriers should be incorporated into the system in accordance with the manufacturer s installation instructions 15 9 Once the horizontal holding tracks are in position and the insulation board is placed onto the holding track the vertical T splines are placed vertically into the pre cut grooves and the next insulation board is slotted into place 15 10 Installation continues as described above with the insulation boards being staggered The level ot the holding and termination tracks and the width of the cavity should be checked at regular intervals to help ensure a uniform level is maintained A typi
22. found in England and Wales Approved Documents to Part L and for new thermal elements to existing buildings Accredited Construction Details version 1 0 tor new build see also SAP 2009 Appendix K and the iSBEM User Manual Scotland Accredited Construction Details Scotland Northern Ireland Accredited Construction Details version 1 0 4 10 4 The product can maintain or contribute to maintaining continuity of thermal insulation at junctions 10 5 Care must be taken to ensure an appropriate thickness of insulation is used particularly at points such as junctions between floors and walls and at window and door reveals to avoid thermal bridging and reduce the risk of condensation forming at these points Items such 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 11 Maintenance Ai 1 1 Regular checks should be made on the installed insulation system particularly at joints with other elements to ensure that ingress of water does not occur This should verity that architectural details tor shedding water clear of the building are present and functioning and that external plumbing fitments are in good condition Maintenance schedules should include the replacement and resealing of joints for example between the insulation system and window and door trames The interval between inspections should be considered for e
23. he base coat primer and finish must be stored at or above 4 C in sealed containers out of direct sunlight 2 4 Components are delivered in the containers and quantities listed in Table 1 Each container carries product identification Table 1 Component supply details Component Quantity and packaging Insulation wrapped in plastic film Standard Plus Mesh 1 22 m wide roll Detail Mesh 240 mm wide roll Genesis 27 2 kg pail Primer with Sand 27 2 kg pail PMRB finishes 32 kg pail Page 4 of 16 Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on the Outsulation Rail System 3 General 3 1 The Outsulation Rail System when installed in accordance with this Certificate is effective in reducing the thermal transmittance U value of the walls of new and existing buildings It is essential that the detailing techniques specified in this Certificate are carried out fo a high standard it the ingress of water into the insulation is to be avoided and the full thermal benetit obtained trom treatment with the systems 3 2 The system will improve the weather resistance of a wall and provide a decorative finish However it may be installed only where other routes for moisture penetration have been dealt with separately and where there are no signs ot dampness on the inner surtace of the wall other than those caused solely by condensation The systems can be used to overcome cond
24. her seals to be used and location of water deflection channels see Figure 4 areas where suitable silicone sealants must be used position of fire barriers Page 9 of 16 14 2 The suitability of the construction for the installation of the system is determined as part of the pre installation survey 14 3 All necessary repairs to the building structure must be completed before the installation of the insulation system commences 14 4 The tlatness of surfaces must be checked this may be achieved by using a straightedge spanning the storey height Any excessive irregularities ie greater than 10 mm must be made good prior to installation to ensure that an appropriate width of drainage cavity is maintained 14 5 On existing buildings purpose made sills must be fitted to extend beyond the finished face of the system New buildings should incorporate suitably deep sills 14 6 Where appropriate external plumbing should be removed and alterations made to underground drainage to accommodate its repositioning on the finished face of the insulation system 15 Procedure General 15 1 Application of the system is carried out in accordance with the Certificate holder s current installation instructions 15 2 Application of coating materials must not be carried out at temperatures below 4 C or above 30 C nor if exposure to frost is likely and the coating must be protected trom rapid drying Weather conditions therefore should be monitored to ens
25. his Certificate and can only be determined from tests performed by a UKAS accredited laboratory for the test concerned 6 6 Fire stopping or tire barriers should be incorporated into a construction where required by the relevant building regulations to maintain the continuity of tire resistance England and Wales Approved Document B Sections 5 and 8 2 Scotland Technical Standards 2 2814 Northern Ireland Technical Booklet F Section 3 1 Dwellinghouses 2 Buildings other than dwellinghouses 3 Technical Handbook Domestic 4 Technical Handbook Non Domestic 7 Proximity of flues and appliances When the insulation system is installed in close proximity to certain tlue 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 Northern Ireland Technical Booklet L 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic 8 Rain penetration 8 1 Guidance in BRE report BR 262 2002 should be followed in that the designer should select a construction and cavity type 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 Northern Ireland Technical Booklet C Section
26. icone sealant insect mesh Figure 1 Outsulation Rail System insulation board breather membrane shims sheathing board T M Wf MUA YUU Fspline holding track Wh tlashing L finish WW on 4 p gt Vi reinforcing mesh embedded in base coat starter track with weep holes EPS packer continuous flashing 2 Delivery and site storage 2 1 The insulation boards are delivered in shrink wrapped polyethylene packs bearing the manufacturer s name and product identification 2 2 The insulation must be protected trom prolonged exposure to sunlight by either storing opened packs under cover or recovering with opaque sheeting In addition the insulation should be stored on a firm clean level base off the ground and under cover until required for use Care must be taken when handling the insulation boards to avoid both damage and contact with solvents or bitumen products The boards must not be exposed to open flame or other ignition sources 2 3 T
27. ime bloom The occurrence of this may be reduced by avoiding application in adverse weather conditions The effect is less noticeable on lighter colours 13 General Application of the system within the context of this Certiticate is carried out by installers recommended by the Certiticate holder A recommended installer is a company e employing operatives who have been trained and recommended by the Certificate holder to install the system and have operatives that upon completion of their training have been issued with an appropriate training certiticate by the Certiticate holder e having undertaken to comply with the Certificate holder s application procedure containing the requirement for each application team to include at least one member with a training certificate e subject fo supervision by the Certificate holder including site inspections 14 Site survey and preliminary work 14 1 Before application of the system a pre installation survey of the property is carried out to determine whether repairs are required to the sheathing board or steel frame Repairs should be carried out before installation commences A specification is prepared for each elevation of the building indicating tor example position of starter tracks shims tracks and render beads position and amount of reinforcing mesh additional reinforcing mesh at corners of openings detailing around windows doors and at eaves dpc level location and type of weat
28. ing domestic and non domestic buildings Technical Specification 1 Description 1 1 The Outsulation Rail System comprises a rail support system mechanically fixed to the substrate and insulation boards locking into the frame and covered with render finishes see Figure 1 The system comprises Rail support system e rails unplasticised polyvinyl chloride PVC U or aluminium rails including starter tracks holding tracks and termination tracks fastened to the substrate e vertical T splines for supporting vertical edges of insulation boards and fit into grooves in the insulation board edges e deflection beads channels for deflecting water present in the drainage cavity around openings and penetrations e polyamide shims used where required as spacers between the substrate and rails to achieve the desired cavity width The rails are fixed to the substrate through the shims e Drwit approved mechanical fixings for fixing the rails and other profiles to the substrate e packers pieces of EPS 600 mm long used behind the insulation board in the starter track and with deflection beads to close the cavity where required Insulation e insulation boards expanded polystyrene EPS grooved edge boards of size 500 mm by 500 mm thickness from 50 mm to 250 mm in 10 mm increments and a minimum grade of EPS O classified as Euroclass E in accordance with BS EN 13501 1 2007 with a tensile resistance greater than 115 kPa
29. k Hem ADS OBRA website www bbacerts co uk Page of 16 Regulations In the opinion of the BBA the Outsulation Rail System 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 Building Regulations 2010 England and Wales a i 5 Requirement Al Loading Comment The system can sustain and transmit wind loads to the structural frame See sections 5 5 and 5 10 of this Certificate Requirement B4 1 External fire spread Comment The system can meet this Requirement See sections 6 1 to 6 6 of this Certificate Requirement C2 b Resistance to moisture Comment The system provides a degree of protection against rain ingress See sections 8 3 to 8 5 of this Certificate Requirement C2 c Resistance to moisture Comment The system contributes to minimising the risk of interstitial and surface condensation See sections 9 1 9 2 9 7 and 9 9 to 9 11 of this Certificate Requirement L1 a i Conservation of fuel and power Comment The system can contribute to enabling a wall to meet the Target Emission Rate See sections 10 2 and 10 4 of this Certificate Requirement Regulation 7 Materials and workmanship Comment The system is acceptable See section 12 1 and the Installation part of this Certificate s The Building Scotland Regulations 2004 as amended 5 Regulation 8 1 2 Fitness and dura
30. m 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 and maintained It does not purport in any way to restate the requirements of the Health amp Safety at Work etc Act 1974 or of any other statutory common law or other duty which may exist at the date of this Certiticate nor is conformity with such information to be taken as satistying the requirements of the 1974 Act or of any statutory common law or other duty of care In granting this Certiticate the BBA does not accept responsibility to any person or body for any loss or damage including personal injury arising as a direct or indirect result of the manufacture supply installation use and maintenance of this product system British Board of Agr ment tel 01923 665300 Bucknalls Lane ere OO ZS eS c0 Garston Watford email mail bba star co uk Herts VVD25 9BA website www bbacerts co uk Page 16 of 16
31. nce with section 13 Site survey and preliminary work of this Certificate 3 5 New walls subject to the national Building Regulations should be constructed in accordance with the relevant recommendations of e BS EN 1993 1 1 2005 Eurocode 3 and other parts where appropriate e BS EN 1995 1 2 2004 Eurocode 5 and other parts where appropriate 3 6 Other new buildings not subject to regulatory requirements should also be built in accordance with the Standards identified in section 3 5 3 7 Drainage deflection beads are incorporated into the system to deflect water present in the drainage cavity around openings other penetrations or items that block the drainage cavity see section 15 6 3 8 It is essential that the insulation system is installed and maintained in accordance with the conditions set out in this Certificate 3 9 The effect of the installation of the insulation system on the acoustic performance of a construction is also outside the scope of this Certiticate 3 10 The fixing of rainwater goods satellite dishes clothes lines hanging baskets and similar items is outside the scope of this Certificate 4 Practicability of installation Construction of the system is carried out by contractors trained and recommended by the Certiticate holder in accordance with the Certificate holder s Installation Manual see section 13 5 Strength and stability General 5 1 Installations incorporating the insulation system can be desig
32. ned to provide adequate resistance to design loads applicable in the UK 5 2 Negative wind pressure suction is resisted by the bond between the render and the insulation boards the flexural strength of the render insulation composite the strength of the fixing rail to insulation connection and the strength of the connection between the fixing rail and substrate wall 5 3 Positive wind load pressure is transferred to the substrate wall directly via compression and bending of the render and insulation to the fixing rail and shims and through the sheathing board to the structural frame Page 5 of 16 5 4 Provided the substrate is suitable see section 5 9 the fixings will effectively transfer the seltweight of the system to the substrate The seltweight of the system including the render and the insulation is transferred to the substrate via the fixing rails The number of rail fixings and the span between fixings should be determined by the building designer f 5 5 The wind loads on the walls should be calculated in accordance with BS EN 1991 1 4 2005 or BS 6399 2 1997 Special consideration should be given to locations with high wind load pressure coefficients additional fixings 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 system 5 6 Tests carried out on an installation with horizontal rails attached to a rigidl
33. oat immediately 15 18 When Standard Plus mesh is used joint overlaps should be at least 65 mm and board terminations should be back wrapped Detail mesh can be used for backwrapping and the joint overlaps with the standard mesh should be at least 65 mm When heavy duty mesh is used within the first base coat it should not be overlapped but fitted with close butt joints 15 19 The mesh should be wrapped around board edges at openings penetrations or other termination points The base coat is applied to the surface of the insulation board to a uniform thickness The reinforcing mesh is immediately embedded with its concave surface to the wall to reduce its tendency to curl The surface is smoothed with a trowel working from the centre toward the edges until the bare mesh is fully covered and not visible The reinforcing mesh is also wrapped around the wall corners over the corner mesh and fixed in position by coating the faces and edges with the adhesive base coat After the base coat has dried normally a minimum of 24 hours the finish is applied to a thickness appropriate to the grade The overall render thickness achieved is 4 1 mm with standard reintorcing mesh and 7 6 mm with the combined standard and heavy duty mesh 15 20 Additional pieces of reintorcing mesh should be used diagonally at the corners of openings as shown in Figure 6 Angle beads and stop beads are positioned in accordance with the Certificate holder s installation instru
34. on thicknesses passed the fire pertormance test see section 6 Risk of condensation the system can contribute to limiting the risk of surtace and interstitial condensation see section 9 Thermal performance the system can be used to improve the thermal performance of external walls or contribute to meeting the Building Regulations requirements see section 10 Durability with appropriate care the insulation system should remain effective for at least 30 years see section 1 2 The BBA has awarded this Agr ment Certificate to the company named above for the product described herein This product 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 ise Blanes EE Date of First issue 26 April 2011 Brian Chamberlain Greg Cooper Head of Approvals Engineering 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 665300 Bucknalls Lane w OW OZE COS 0 Garston Watford email mail bba star co u
35. s between boards m EPS packer holding track used Hash as vertical supports cl EPS packer wood sill stop track C ashing E N cocina Ogee l p a AO mm minimum cH breath b reather membrane OBAIR AT w Je reinforcing mes HORE y embedded sedani 7 e gt T a in base coat EOE IR 7 shim insulation N roldi board z Y oong gt pies track Je Dryvit finish SSS l insulation board Dryvit finish ee reintorcing mesh breather membrane embedded it required base coat 15 27 Continuous surfaces should be completed without a break 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 system should be checked by the person supervising the works at the end of each relevant stage of the installation Information trom the Certificate holder should be sought on this subject Page 14 of 16 17 Tests 17 1 Tests were carried out in accordance with MOAT No 22 1988 to determine e heat spray cycling e resistance to freeze thaw e impact resistance 17 2 An examination was made of data relating to e adequacy of fixing system e durability of finish e Euroclassification of the finish in accordance with BS EN 13501 1 2007 17 3 The practicability of installation and the effectiveness of typical details were examined 17 4 An examination
36. ssue of this Certificate and include any Act of Parliament Statutory Instrument Directive Regulation British European or International Standard Code of Practice manufacturers instructions or any other publication or document similar or related to the aforementioned 19 3 This Certificate will remain valid for an unlimited period provided that the product system and the manufacture and or fabrication including all related and relevant processes thereof e are maintained at or above the levels which have been assessed and found to be satisfactory by the BBA e continue to be checked as and when deemed appropriate by the BBA under arrangements that it will determine e are reviewed by the BBA as and when it considers appropriate 19 4 In granting this Certificate the BBA is not responsible for e the presence or absence of any patent intellectual property or similar rights subsisting in the product system or any other product system e the right of the Certificate holder to manufacture supply install maintain or market the product system e individual installations of the product system including the nature design methods and workmanship of or related to the installation e the actual works in which the product system is installed used and maintained including the nature design methods and workmanship of such works 19 5 Any intormation relating to the manufacture supply installation use and maintenance of this product syste
37. ure correct curing conditions 15 3 All rendering should be in accordance with the relevant recommendations of BS EN 13914 1 2005 and Bo EN 139142 2005 Movement joints 15 4 Movement joints should be incorporated into the system at the locations identitied by the building designer see section 1 Existing movement joints should be continued through the system A typical movement detail can be seen in Figure 2 15 5 Expansion joints are installed at predetermined positions where necessary along the building depending on the individual requirements of each job Figure 2 Movement joint flashing substrate expansion joint substrate expansion joint stop track back insulation board reinforcing mesh embedded in Pei breather OO EPS packer mace l membrane Epu reinforcing mesh shim Dryvit finish embedded in finish EPS packer EE eee base coat sealant with close stop track back flashing cell backer rod breather membrane sealant with closed cell backer rod shim Positioning and securing insulation boards 15 6 The base profile is secured to the external wall above the damp proof course using the appropriate profile fixings at a maximum of 300 mm centres Drainage deflection beads are mechanically fixed over all window and door openings penetrations and other items that cross the drainage cavity Horizontal and vertical tire barriers are installed following the design
38. was made of data relating to BS 8414 2 2005 Full details of the construction tested can be found in BRE Test Reports 240418 1 and 24041 8 2 18 Investigations 18 1 The structural performance of the insulation system was assessed 18 2 The practicability of installation and the effectiveness of detailing techniques were examined Bibliography BS 5250 2002 Code of practice for control of condensation in buildings BS 6399 2 1997 loading for buildings Code of practice for wind loads BS 8200 1985 Code of practice for design of non loadbearing external vertical enclosures of buildings BS 8414 2 2005 Fire performance of external cladding systems Test method for non loadbearing external cladding systems fixed to and supported by a structural steel frame 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 1993 1 3 2006 Eurocode 3 Design of steel structures General rules Supplementary rules for cold formed members and sheeting BS EN 1995 1 2 2004 Eurocode 5 Design of timber structures General Structural tire design 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
39. y supported timber substrate with steel fixings with a head diameter of 14 mm placed at a maximum of 300 mm centres with vertical T splines and injected polyurethane foam at the board edges indicated that the system can resist a wind load of 1000 Pa ie 150 N per fixing see section 5 9 5 7 From tests carried out in accordance with ETAG 004 2000 section 5 1 4 1 it is confirmed that the bond between the basecoat and insulation is adequate to resist negative pressures likely to occur in buildings in the UK 5 8 Assessment of structural performance for individual buildings should be carried out by a suitably qualified engineer or other appropriately qualified person to confirm that e the substrate wall has adequate strength to resist the additional loads that may be applied as a result of installing the system ignoring any positive contribution that may occur from the insulation system e the proposed system and associated fixing layout provide adequate resistance to negative wind loads based on the results of the site investigation see section 5 9 5 9 An appropriate number of site specific pull out tests should be conducted on the substrate of the building to determine the characteristic pullout resistance of the fixings This should be determined in accordance with the guidance given in ETAG 014 2002 Annex D by e calculating the mean of the five lowest pull out values and taking 60 of this value as the characteristic resistance
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