BBA Certificate
Contents
1. G52 4TG Technical Specification 1 Description 1 1 The StxTherm Eco External Thermal Insulation System see Figure 1 comprises inner to outer layers insulation board adhesive type used is dependent on the substrate and its condition types mix ratios and coverage rates are shown in Table 1 EPS expanded polystyrene insulation board 1000 mm by 500 mm and in thicknesses of 10 mm increments between 50 mm and 180 mm in 10 mm increments with a tensile resistance of gt 100 kPa a shear strength of gt 0 02 N mm and a shear modulus of elasticity of gt 1 N mm f ixings for mechanically fixed systems types of fixing are shown in Table 2 basecoat Stomix Multibond see Table 1 rendered in a continuous layer over the EPS panels reinforcing mesh woven glassfibre mesh mesh size 3 5 mm by 3 5 mm with a residual strength after ageing of gt 20 N mm and a density of 160 kg m embedded into the basecoat render key coat Stomix Primer dilutable pigmented liquid applied in preparation for the finishing coat surface finish silicon based thinayer rustic coating supplied as a ready mixed paste Stomix Silkotex The finishes contain aggregates the suffix F indicates a particle size of from 1 5 mm to 2 mm and a suffix D a particle size of from O mm to 3 mm Table 1 Types mix ratios and coverage rates for StxTherm ECO insulation board adhesives Adhesive Form Water per kilo of powder Amoun2. corner reinforcement These are provided to the specifier s requirements and approved by the Certificate holder e screw fixings in various sizes e sealants e end stops e sills e render beads Page 4 of 16 Figure 2 Pattern of fixings Figure 3 Adhesive application patterns dot dab method for fully bedded method uneven substrates for even substrates 2 Delivery and site handling 2 1 The insulation is delivered to site shrinkwrapped in polythene packs bearing the manufacturer s and product identification marks and batch numbers The product packaging includes the CE marking as described in the General part of this Certificate 2 2 Components are delivered to site in the quantities and packages listed in Table 3 Each package carries the manufacturer s and product s identification batch number and CE marking Page 5 of 16 Table 3 Component supply details Component Quantity and package Adhesive and basecoat Stomix Multibond 25 kg bag Reinforcing mesh 50 mx 1 m roll Key coat Stomix Primer 25 kg tub Surface finish Stomix Silkotex 25 kg tub 2 3 The system components should be protected from moisture during transport and storage 2 4 The insulation boards should be stored horizontally on a firm clean level base off the ground and must be protected from prolonged exposure to sunlight either by storing opened packs under cover in dry conditions or recove
3. 12 1 and the Installation part of this Certificate Regulation 9 Building standards construction Standard el Structure Comment The system can sustain and transmit wind loads to the substrate wall See section 5 4 of this Certificate Standard 2 6 Spread to neighbouring buildings Comment The system incorporates materials which would not be classed as non combustible Completed walls therefore would be regarded as unprotected areas as defined in this Standard with reference to clauses 2 6 12 and 2 6 2 l2 See sections 6 1 to 6 4 6 7 and 7 of this Certificate Standard DI Spread on external walls Comment The system incorporates materials which would not be classed as non combustible as defined in clauses 2 7 1012 and 2 7 22 of this Standard and should not therefore be used on walls one metre or less from a boundary See sections 6 1 to 6 4 6 7 and 7 of this Certificate Standard 3 10 Precipitation Comment Walls insulated with the system will contribute to a construction satisfying this Standard with reference to clause 3 10 1013 See sections 8 1 to 8 4 of this Certificate Standard 15 Condensation Comment Walls insulated with the system will satisfy the requirements of clauses 3 15 1 3 15 4 and 3 15 51 of this Standard See sections 9 3 to 9 7 of this Certificate Standard 6 1 b Carbon dioxide emissions Standard Cw Buildings insulation envelope Comment The system can contribute to s
4. Details version 1 0 for 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 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 and repair f 11 1 As part of a maintenance programme regular inspections should be carried out on the installed system to ensure that ingress of water does not occur Such programmes should include the replacement and resealing of joints eg those between the insulation system and window and door frames The interval between inspections should be considered for each on a building by building basis taking into consideration such factors as the building location and height Any necessary repairs should be put into effect immediately 11 2 The designer should ensure appropriate provision for access is available to enable maintenance inspections to take place safely 11 3 Damaged areas must be repaired using the appropriate components The Certificate holder should b
5. 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 18 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 18 5 Any information relating to the manufacture supply installation use and maintenance 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 and maintained It does not purport in any way to restate the requirements of the Health amp Satety at Work etc Act 1974 or of any other statutory common law or other duty which may exist at the date of this Certificate nor is conformity with such information to
6. proximity to certain flue pipes the relevant provisions of the national A d Building Regulations should be met England and Wales Approved Document J Scotland Mandatory Standard 3 19 clauses 3 19 2012 3 19 3012 and 3 19 4012 Northern Ireland Technical Booklet L 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic 8 Rain penetration FA d ensure that walls are adequately weathertight prior to its application 8 2 Designers and installers should take particular care in detailing around openings penetrations and movement joints to minimise the risk of rain ingress 4S The system will provide a degree of protection against rain ingress However care should be taken to Page 8 of 16 8 3 For externally insulated singleleat masonry walls guidance is given in BS EN 1996 1 1 2005 and BS EN 998 2 2005 on the minimum thickness of render required for the different exposure categories 8 4 Guidance given in BRE report BR 262 2002 Thermal insulation avoiding risks should be followed in connection with the weathertightness of solid wall constructions 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 10012 Northern Ireland Technical Booklet C Section
7. 2 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic 8 5 When using the system consideration must be given to the overall design to minimise the risk of condensation and the recommendations of BS 5250 2002 should be followed 8 6 At the tops of walls the system should be protected by an adequate overhang or other detail designed for use with this type of system see sections 15 15 and 15 16 8 7 The fixing of rainwater goods satellite dishes clothes lines hanging baskets and similar items is outside the scope of this Certificate 8 8 It is essential that the system is installed and maintained in accordance with the conditions set out in this Certificate 9 Risk of condensation 9 1 Walls should be weathertight prior to the application of the system Consideration should be given to the overall design to minimise the risk of condensation and the recommendations of BS 5250 2002 should be followed Walls incorporating ETICS can adequately limit the risk of interstitial condensation when they are designed and constructed in accordance with BS 5250 2002 Section 8 and Annex D Additional guidance may be obtained from BS 5250 2002 Section 8 and BRE report BR 262 2002 Thermal insulation avoiding risks 9 2 Designers must ensure that an appropriate condensation risk analysis has been carried out for all parts of a construction including openings and penetrations to ensure condensation does not oc
8. A_N APPROVAL INSPECTION Sto Ltd TESTING 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 sto com 13 4970 website www sto co uk Product Sheet 1 STOMIX EXTERNAL WALL INSULATION SYSTEMS STXTHERM ECO EXTERNAL THERMAL INSULATION SYSTEM This Certificate relates to the StxTherm Eco External Thermal Insulation System for use as an external insulation and decorative finish on exterior walls of new or existing buildings constructed of masonry or concrete AGREMENT CERTIFICATION INCLUDES e factors relating to compliance with Building Regulations where applicable e factors relating to additional non regulatory information where applicable e independently verified technical specification e assessment criteria and technical investigations e design considerations e installation guidance e regular surveillance of production e formal three yearly review KEY FACTORS ASSESSED Practicability of installation the system should only be installed by installers who have been trained and approved by the Certificate holder see section 4 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 the system incorporates materials which would not b
9. all on which it is installed but can contribute to durability by providing enhanced protection from the effects of weathering f 3 3 The 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 to a high standard if the ingress of water into the insulation is to be avoided and the full thermal benefit obtained The system is not intended to ensure the airtightness of the building structure 3 4 The system will improve the weather resistance of a wall and provide a decorative finish However it may only be installed where other routes for moisture penetration have been dealt with separately and where dampness other than that caused solely by condensation is not evident on the inner surface of the wall The system can contribute to minimising condensation on internal wall surfaces 3 5 Existing buildings subject to national Building Regulations should have wall surfaces in accordance with section 13 Site survey and preliminary work of this Certificate 3 6 New buildings subject to national Building Regulations 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 Exclu
10. areas where flexible sealants must be used e any alterations to external plumbing e where required the position of fire barriers 13 3 The survey should include tests conducted on the walls of the building by the Certificate holder or their approved applicators see section 14 to determine the adequacy of the substrate 13 4 Trial tests are conducted on the wall to determine the pull out resistance of the proposed mechanical fixings or the bond strength of the adhesive An assessment and recommendation is made on the type and number of fixings required to withstand the building s expected wind loading based on calculations using the test data the relevant wind speed data for the site see Table 3 Where required to comply with fire regulations at least one fixing per square metre should be of a non combustible type see section 6 13 5 All modifications and necessary repairs to the building are completed before installation commences Page 10 of 16 13 6 Surfaces should be sound clean and free from loose material The flatness of surfaces must be checked this may be achieved using a straight edge spanning the storey height Any excessive irregularities ie greater than 10 mm or 20 mm in 1 m must be made good prior to installation to ensure that the insulation boards are installed with a smooth in plane finished surface 3 7 Where surfaces are covered with an existing rendering it is essential that the bond between the backgr
11. atisfying this Standard with reference to all or part of clauses 6 1 1 6 1 2 6 1 3 6 1 6 6 2 12 6 2 31 6 2 40 6 2 52 6 2 81 and 6 2 10 See section 10 3 of this Certificate 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic 4 The Building Regulations Northern Ireland 2012 2 Regulation 23 Fitness of materials and workmanship Comment The system is acceptable See section 12 1 and the Installation part of this Certificate Regulation 28 Resistance to ground moisture and weather Comment Walls insulated with the system will satisfy this Regulation See sections 8 1 to 8 4 of this Certificate Regulation 29 Condensation Comment Walls insulated with the system will satisfy the requirements of this Regulation See sections 9 3 to 9 7 of this Certificate Regulation 30 Stability Comment The system can sustain and transmit wind loads to the substrate wall See section 5 4 of this Certificate Regulation 36 a External fire spread Comment The system can satisfy this Regulation See sections 6 1 to 6 4 6 7 and 7 of this Certificate Regulation 39 a i Conservation measures Comment The system will enable a wall to meet the requirements of this Regulation See section 10 3 of this Certificate Page 2 of 16 Regulation 40 Target carbon dioxide Emissions Rate Comment The system will contribute to a building satisfying its target emission rate See section 10 3 of this C
12. be taken as satisfying the requirements of the 1974 Act or of any statutory common law or other duty of care In granting this Certificate 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 fax 01923 665301 Watford email mail bba star co uk Herts WD25 9BA website www bbacerts co uk Page 16 of 16
13. buildings less than one metre from a boundary the system is acceptable provided the wall meets the fire resistance requirements in Approved Document B Tables Al and A2 from both sides 4 e the system is acceptable subject to the above conditions for use on a building which has a floor up to 18 m above ground level Scotland Domestic and Non Domestic usel e the system is acceptable for use on buildings more than one metre from a boundary and up to 18 m above ground level The system is not classified as non combustible therefore calculations for unprotected areas apply e the system cannot be used on buildings less than 1 metre from a boundary or on buildings with a storey higher than 18 m above ground level 1 Additional guidance can be found in the Scottish Building Standards Technical Handbook Domestic Annex 2A and Technical Handbook Non Domestic clause 2 7 2 2 Combustible cladding need not be included in the calculation for an unprotected area where the combustible cladding is attached to the structure of the building and the external wall contains no openings other than the small openings described in Mandatory Standard 2 6 clause 2 6 2b and the wall behind the cladding has the appropriate fire resistance duration from the inside Mandatory Standard 2 6 clause 2 6 2b describes an area of not more than O 1 m which is at least 1 5 m from another unprotected area in the same wall Addit
14. cur Surface condensation 9 3 Walls will limit the risk of surface condensation adequately when the thermal transmittance U value does not exceed 0 7 W m K at any point and the junctions with other elements are designed in accordance with the relevant requirements of the publications referred to in section 3 9 4 Walls will adequately limit the risk of surface condensation when the thermal transmittance U value does not exceed 1 2 W m K at any point Guidance may be obtained from BS 5250 2002 Section 8 and BRE report BR 262 2002 Thermal insulation avoiding risks Interstitial condensation 9 5 The systems have a water vapour resistance such that under the types of conditions likely to occur in a dwelling in the United Kingdom interstitial condensation should not occur within the insulation 9 6 Ifa 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 from the formation of interstitial condensation in the wall 9 7 Walls incorporating the systems will adequately limit the risk of interstitial condensation when they are designed and constructed in accordance with BS 5250 2002 Section 8 and Annex D 9 8 The render used with the systems has an equivalent air layer thickness Ss of lt 2 m 10 Thermal performance 10 1 Calculations of the thermal transmittance U value should be carri
15. e classed as non combustible but can meet national fire regulations subject to certain restrictions see sections 6 and 7 Thermal performance the system can be used to improve the thermal performance of external walls and contributes to meeting the requirements of the building regulations see section 10 The BBA has awarded this Agr ment Certificate to the company named above for the system described herein This 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 ee oes j eset Date of First issue 27 February 2013 Sean Moriarty Head of Approvals Greg Cooper Energy and Ventilation Chief Executive Certificate amended on 25 June 2014 to add Sto Turbofix adhesive as a component 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 fax 01923 665301 Watford email mail bba star co uk Herts VWWD25 9BA website www bbacerts co uk Page 1 of 16 Regulations In the opinion of the BBA StxThe
16. e contacted for further information 12 Durability 12 1 The system should remain effective for at least 30 years provided any damage to the surface finish is 53 repaired immediately and regular maintenance is undertaken see section 11 12 2 The finish may become discoloured with time The rate at which this occurs will depend on the initial colour the degree of exposure the level of atmospheric pollution and the design and detailing of the wall In common with traditional renders discoloration by algae and lichens may occur in wet areas 13 Site survey and preliminary work 13 1 Installation of the StxTherm Eco External Thermal Insulation System should not be carried out if the temperature of the air or the surface of the wall to be treated is below 5 C or above 30 C Installation should not take place during rain or strong wind or sunshine The materials must be protected from rain frost and direct sunlight whilst curing Further information may be obtained from the Certificate holder 13 2 A pre installation survey of the property is carried out to determine suitability for treatment and the need for any necessary repairs to the building structure betore application of the system A specification is prepared for the building indicating e where required additional corner mesh and reinforcement e the position of beads e detailing around windows doors and at eaves e dpc level e exact position of movement expansion joints e
17. ed out in accordance with BS EN ISO 6946 2007 and BRE Digest BR 443 2006 Conventions for U value calculations using the declared thermal conductivity Noo 99 value of 0 038 W m7 K7 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 masonry and its internal finish Example U values are given in Table 5 Table 5 Insulation thicknesses required to achieve typical design values 2 U value W m K Thickness of insulation mm 0 19 0 26 140 0 28 130 0 30 120 1 Based on a wall constructed of 200 mm dense concrete blocks 1 75 W m K with a 12 mm dense plaster finish 2 Including eight steel fixings of 5 5 mm diameter per metre Asie 50 W m K assumes that the fixing penetrates the whole insulation layer 3 Based upon incremental insulation thickness of 10 mm Page 9 of 16 documents supporting the national Building Regulations _ 4 10 3 When considering insulation requirements designers should refer to the detailed guidance given in 1 ain or contribute to maintaining continuity of thermal insulation at junctions between ailed guidance for junctions and on limiting heat loss by air infiltration can be found in 10 4 The system can main elements and openings De E England and Wales Approved Documents to Part L and for new thermal elements to existing buildings Accredited Construction
18. ertificate 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 2 and 2 3 of this Certificate Non regulatory Information NHBC Standards 2013 NHBC accepts the use of the StxTherm Eco External Thermal Insulation System when installed and used in accordance with this Certificate in relation to NHBC Standards Part 6 Superstructure excluding roofs Chapter 6 9 Curtain walling and cladding This Certificate relates to the StxTherm Eco External Thermal Insulation System comprising expanded polystyrene EPS insulation boards mesh reinforced render coat surface coat and paint finish The system is applied to the outside of external walls of existing or new buildings constructed of masonry or concrete Application and maintenance must be carried out strictly in accordance with this Certificate and the Certificate holder s instructions by installers trained and approved by the Certificate holder The Certificate holder has taken the responsibility of CE marking the product in association with ETAO5 0054 The system is manufactured and designed by Stomix spol sr o and is imported into the UK and marketed by Sto Ltd 2 Gordon Avenue Hillington Park Glasgow
19. esh should be free of rippling or creases and must be fully embedded in the basecoat Additional reinforcement should be used in areas of high stress such as corners and around openings see Figure 6 5 11 Where required fixings can be installed through the reinforcing mesh This should be done before the basecoat hardens Mechanical fixings placed through the reinforcement should be smoothed over with basecoat as soon as they have been installed 5 12 The basecoat is trowelled onto the surface of the insulation boards to an appropriate thickness ensuring it butts up against details such as under window sills and trowelled smooth The basecoat surface is roughened with a notched trowel or comb 5 13 The basecoat should be left to dry thoroughly before application of the decorative finish Drying time will depend on the local conditions at the time of installation The finish coat is trowel applied and soothed to the desired effect 5 14 Continuous surfaces must be completed without a break so the coatings must always be applied to a wet edge Installation continues until the whole wall is completely covered including where appropriate the building soffits 5 15 At the tops of walls the system must be protected by an adequate overhang or by an adequately sealed purpose made flashing see Figure 7 5 16 Care must be taken in the detailing of the system around openings and projections to ensure adequate protecti
20. h the provisions of England and Wales Approved Document B Volume 1 paragraph 8 4 and Volume 2 paragraphs 12 5 and 12 6 Scotland Mandatory Standards 2 6 and 2 7 clauses 2 6 1M2 to 2 6 6023 2 6 72 2 7 12 and 2 7 212 respectively and Annexes 2A 2C and 2E Northern Ireland Technical Booklet E Section 3 clause 4 3 to 4 40 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic Page 7 of 16 6 4 To limit the risk of fire spread between floors in buildings subject to the Building Regulations in England Wales Scotland and Northern Ireland fire barriers should be installed at each floor level above the first floor ie starting with the floor level of the third storey as detailed in BRE report BR 135 2003 Fire Performance of External Insulation for Walls of Multi storey Buildings see section 13 2 of this Certificate 6 5 In buildings not subject to the Building Regulations it is recommended that designers should follow the guidance given in section 6 4 6 6 The documents listed in section 6 3 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 However the following information is provided for guidance purposes England and Wales e for buildings one metre or more from a boundary the system is acceptable e for
21. inst the wall and butted tightly together with the vertical joint staggered by at least 100 mm Alignment should be checked as work proceeds Joints in the system greater than approximately 2 mm should be filled with slivers of insulation board or PU foam and any high spots or irregularities removed by planing with a rasp over the whole surface The surface of the EPS boards should be planed prior to the application of the render basecoat n 5 7 When mechanically fixing adhesive is applied to the boards and the boards are positioned against the wall as with the adhesive fix system After two days holes are drilled through the insulation boards and adhesive and into the substrate wall and the mechanical fixings are applied Care must be taken to ensure the fixing holes are drilled perpendicular to the surface of the insulation 5 8 To fit around details such as windows and doors insulation boards may be cut with a sharp knife or fine toothed saw 5 9 Installation continues until the whole wall is completely covered including where appropriate the building softits Application and reinforcing 5 10 The basecoat is applied to an appropriate thickness minimum 3 mm over the insulation boards no sooner than two days after the adhesive bonding of the boards and after the mechanical fixings have been installed The reinforcement mesh is fully embedded into the wet basecoat and should overlap by at least 100 mm at all mesh joints This m
22. ional guidance concerning the calculation of unprotected areas can be found in clause 2 6 4 Northern Ireland e for buildings one metre or more from a boundary the system is acceptable F e for buildings less than one metre from a boundary the system is acceptable provided the wall meets the fire resistance requirements in the Technical Booklet Tables 3 1 and 3 2 from both sides 4 4 e the system is acceptable subject to the above conditions for use on a building which has a storey the floor of which is up to 18 m above ground level 6 7 The adhesive must be applied to the insulation boards in a way that prevents the formation of continuous 53M cavities see section 1 3 Any incidental cavities present within the system such as those formed between the external wall insulation system and the substrate must have appropriate fire barriers in accordance with the relevant clauses or sections of England and Wales Approved Document B Volume 1 Section 6 and Volume 2 Section 9 Scotland Mandatory Standards 2 4 clauses 2 4 1M2 2 4 22 2 4 7 and 2 4 92 2 6 clauses 2 6 10M2 to 2 6 6112 and 2 6 7 and 2 7 clauses 2 7 102 and 2 7 22 and Annex 2A Northern Ireland Technical Booklet E Section 3 clauses 3 35 to 3 39 and Section 4 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic 7 Proximity of flues and appliances When the system is installed in close
23. l of condensation in buildings BS 5628 1 2005 Code of practice for the use of masonry Structural use of unreinforced masonry BS 6399 2 1984 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 998 2 2003 Specification for mortar for masonry Masonry mortar BS EN 1990 2002 Eurocode Basis of structural design BS EN 1991 1 4 2005 Eurocode Actions on structures General actions Wind actions BS EN 1996 1 1 2005 Eurocode 6 Design of masonry structures General rules for reinforced and unreintorced 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 materials and execution of masonry Page 15 of 16 BS EN 1996 3 2006 Eurocode 6 Design of masonry structures Simplified calculation methods for unreinforced masonry structures 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 ISO 6946 2007 Building componen
24. m 5 5 Assessment of structural performance for individual buildings must be carried out by a suitably qualified chartered engineer or other appropriately qualified person to confirm that e the substrate wall has adequate strength to resist additional loads that may be applied as a result of installing the system ignoring any contribution from the insulation system itself e the proposed system and associated fixing pattern and adhesive coverage provides adequate resistance to negative wind loads based on the results of the site investigation see section 6 7 5 6 The supporting wall should be designed and constructed to resist all dead imposed and wind loads on its own The insulation system does not contribute in this respect Adhesive system 5 7 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 Supplementary fixings are used where required It is essential that the appropriate movement joints and expansion joints are used through the insulation systems to ensure all substrate movement is managed in a way that does not damage the insulation systems Mechanical system 4 5 8 An appropriate number of site specific pull out tests are conducted on the substrate of
25. n team to include at least one member with the correct trade supervisory skills is subject to supervision by the Certificate holder This may include unannounced site inspections 15 Procedure General 15 1 Application is carried out in accordance with the current installation instructions of the Certificate holder 15 2 Weather conditions should be monitored to ensure correct application and curing conditions The one coat render should not be applied at temperatures below 5 C or above 30 C if exposure to frost is likely or in damp wet conditions The render must be protected from rapid drying and should not be applied on elevations in direct sunlight or where the substrate is hot 15 3 All rendering should be in accordance with the relevant recommendations of BS EN 13914 1 2005 Positioning and securing insulation boards 15 4 The first row of insulation boards is supported by a base bar fitted above the dpc see Figure 4 Figure 4 Base detail shims to level substrate insulation panels starter track typical finish outside the scope of this Certificate Page 11 of 16 15 5 When adhesively fixing care must be taken to ensure an appropriate amount of adhesive is used and that the appropriate adhesive spread and board fixing patterns are used The adhesive must not be applied onto the sides or fill the gaps between insulation boards 15 6 The insulation boards must be pressed firmly aga
26. on against water ingress and to limit the risk of water penetrating the system Typical window head detail is shown in Figure 8 5 17 On completion of the installation external fittings eg rainwater goods are refixed through the system into the substrate Page 12 of 16 Figure 6 Reinforcement around openings minimum 200 mm x 300 mm glassfibre reinforcement patches applied at stress points Figure Z Typical eaves detail sealing strip e f adhesive Page 14 of 16 Figure 8 Typical window head detail wi ie i lof sealing strip adhesive a 16 Tests An examination was made of data relating to e water vapour permeability e Euro classification fire ratings of the render e resistance to freeze thaw e heat spray cycling e impact resistance e pullout strength of fixings e durability of finish coatings 17 Investigations 17 1 The manufacturing process the methods adopted for quality control of manufactured and boughtin components and details of the quality and composition of the materials used were examined 17 2 An assessment of the risk of interstitial condensation was undertaken 17 3 The practicability of installation and the effectiveness of detailing techniques were examined Bibliography BS 5250 2002 Code of practice for contro
27. ound and the render is adequate All loose areas should be hacked off and reinstated 3 8 On existing buildings purpose made window sills must be fitted to extend beyond the finished face of the system New buildings should incorporate suitably deep sills 3 9 Movement joints in the original building must be carried through the insulation system Expansion joints must be incorporated into the system at predetermined points 3 10 Itis recommended that external plumbing be removed before installation and alterations made to underground drainage where appropriate to accommodate repositioning of the plumbing on the finished face of the system 3 11 New buildings should be of sound masonry dense or no fines concrete construction 3 12 Internal wet work eg screeding or plastering should be completed and allowed to dry prior to the application of a system 3 13 Purpose built window sills and similar items should be designed to prevent water ingress and to deflect water clear of the system 14 Approved installers Application of the system within the context of this Certificate is carried out by installers recommended or recognised by the Certificate holder Such an installer is a company which e employs operatives who have been trained and approved by the Certificate holder to install the system e has undertaken to comply with the Certificate holder s application procedure containing the requirement for each applicatio
28. ring with opaque polythene sheeting 2 5 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 6 The powder mortars should be stored in dry conditions out of the sun and off the ground 2 7 The basecoat finish and primer should be stored in a safe area under cover out of the sun and be protected from excessive heat and frost at all times 2 8 The glasstibre mesh should be stored vertically in dry conditions out of the sun Care must be taken to ensure the rolls are not subject to compression during storage Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on the StxTherm Eco External Thermal Insulation System 3 Use 3 1 The StxTherm Eco External Thermal Insulation System is intended for use as external insulation on the exterior walls of new or existing buildings constructed of masonry or concrete cast on site or as prefabricated panels with a reaction to fire classification of A1 or A2 s2 dO in accordance with BS EN 13501 1 2007 The system may also be used on horizontal or inclined surfaces not exposed to precipitation but such applications are outside the scope of this Certificate 3 2 The system is made from nonloadbearing construction elements It does not contribute directly to the stability of the w
29. rm Eco External Thermal Insulation 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 42 The Building Regulations 2010 England and Wales 5 Requirement Al Loading Comment The system can sustain and transmit loads to the substrate wall See section 5 4 of this Certificate Requirement B4 1 External fire spread Comment The system can meet this Requirement See sections 6 1 to 6 4 6 7 and 7 of this Certificate Requirement C2 b Resistance to moisture Comment The system provides a degree of protection against rain ingress See sections 8 1 to 8 4 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 3 to 9 7 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 section 10 3 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 k The Building Scotland Regulations 2004 as amended 5 Regulation 8 1 2 Fitness and durability of materials and workmanship Comment The use of the system satisfies the requirements of this Regulation See sections 11 1 and
30. sion of water e BS 8000 3 2001 3 7 Other buildings not subject to any of the previous requirements should also be built in accordance with section 3 6 3 8 The choice of fixing method adhesive with supplementary mechanical fixings or mechanical fixings with a minimum of 20 adhesive is dependent on the stability of the substrate and surface preparation may be necessary see section 13 of this Certificate 4 Practicability of installation The system should only be installed by installers who have been trained and approved by the Certificate holder Page 6 of 16 5 Strength and stability 5 1 Installations incorporating the insulation system can be designed to provide adequate resistance to design loads applicable in the UK 5 2 Positive wind load pressure is transferred to the substrate wall directly via bearing and compression of the render and insulation 5 3 Negative wind pressure suction is resisted by the bond between each component The insulation boards are retained by the adhesive and fixings 5 4 The wind loads on the wall should be calculated in accordance with BS 6399 2 1997 BS 8200 53m 1985 and BS EN 1991 1 4 2005 Special consideration should be given to locations with high wind load pressure coefficients as additional fixings may be necessary In accordance with BS EN 1990 2002 it is 4 recommended that a load factor of 1 5 is used to determine the ultimate wind load to be resisted by the syste
31. t required per m of coverage kg Adhesive only system Adhesive mechanically fixed system litres minimum bonded area 40 of total minimum bonded area 20 of total Stomix Multibond Powder 0 24 0 27 4 0 5 0 2 1 5 0 Sto Turbofix Foam 0 16 0 16 Page 3 of 16 Table 2 Types of fixing for mechanically fixed STX THERM ALFA system Fixing related ETA Material and method Dimensions mm Anchor plate Drill diameter Anchor depth diameter Ejotherm NT U ETA 05 0009 Type 1 plastic nailed in 60 8 25 Ejotherm STR UNI ETAO5 0023 Type 1 or 21 plastic screwed in 60 8 25 Ejotherm NTK U ETA 07 0026 Type 1 plastic screwed in 60 8 40 Bravoll PTH KZ 60 8 la ETA 05 0055 Type 3 plastic nailed in 60 8 35 Bravoll PTH KZL 60 8 la ETAO5 0055 Type 3 plastic nailed in 60 8 55 Bravoll PTH 60 8 Lal ETA05 0055 Type 3 plastic nailed in 60 8 35 Bravoll PTH L 60 8 La S ETA05 0055 Type 3 plastic nailed in 60 8 55 1 EPS thickness gt 60 mm 2 Countersunk assembly EPS thickness gt 100 mm 3 EPS thickness gt 50 mm Figure 1 Components insulation board decorative finish Poe fixing if required primer lif required reinforcing coat and glassfibre mesh coat 2 Ancillary items included in the system but outside the scope of this Certificate include profiles a range of PVC products for details such as wall bases end stops corners and window reveals and
32. the building to determine the minimum resistance to failure of the fixings The characteristic pull over resistance should be determined in accordance with the guidance given in ETAG 014 2002 Annex D using 60 of the mean value of the five smallest measured values at the ultimate load 5 9 The resistance to pull over of the fixings from the insulation is given in Table 4 Table 4 Resistance to pull over of fixings kN Position of anchor Failure load kN anchor type Anchor type 2 3 At the panel joint Minimum 0 51 0 47 0 41 Average 0 52 0 48 0 42 Not placed at panel joint Minimum 0 40 0 36 0 36 Average 0 43 0 39 0 39 Impact resistance 5 10 The system with the standard mesh will have an impact resistance suitable for a zone liable to impacts from thrown or kicked objects but in public locations where the height of the system will limit the size of the impact or at lower levels where access to the building is primarily to those with some incentive to exercise care For information on locations where greater impact resistance may be required the Certificate holder should be consulted 6 Behaviour in relation to fire General ee The system has a surface spread of flame classification of B s2 dO in accordance with BS EN 13501 1 st 2007 6 2 The EPS insulation material has a class E rating in accordance with EN13501 1 2007 and is classified as combustible 6 3 The system may be used in accordance wit
33. ts and building elements Thermal resistance and thermal transmittance Calculation method EN 13501 1 2007 Fire classification of construction products and building elements Classification using test data from reaction to fire tests ETAG 004 2000 Guideline for European Technical Approval of External Thermal Insulation Composite Systems with Rendering Conditions of Certification 18 Conditions 18 1 This Certificate 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 Certificate e is valid only within the UK T 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 18 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 issue 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 18 3 This Certificate will remain valid for an unlimited period provided that the product system and the manufacture and or fabrication including all related
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