CERTIFICATE NUMBER 159/13 DATE OF FIRST ISSUE JANUARY 2013 BRE GLOBAL CERTIFICATE OF ASSESSMENT. DATE OF REVISION 2 8 th October 2015

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1 BRE GLOBAL CERTIFICATE OF ASSESSMENT PRODUCT Knauf Render Systems Knauf Warm-Wall Insulation and Render Systems CERTIFICATE NUMBER 159/13 DATE OF FIRST ISSUE JANUARY 2013 (replaces certificates 059/99 & 081/01) DATE OF REVISION 2 8 th October 2015 SUPPLIED BY Knauf UK Kemsley Fields Business Park Sittingbourne Kent ME9 8SR Tel: Fax: technical@knauf.co.uk website: SUMMARY Knauf Render Systems (KRS) consist of a range of cementitious based ready coloured one-coat or two-coat mesh reinforced renders providing various surface textures and colours for application to suitable masonry, concrete and cement board clad steel and timber framed substrates. Knauf Warm-Wall Insulation and Render Systems (KWIRS) additionally incorporate mineral fibre or expanded polystyrene insulation and associated fixings. Carrier rail systems (outside the scope of this certificate, see ) can be incorporated to provide a 15mm cavity when KWIRS are used in conjunction with framed structures. The components of the external wall insulation and render systems are as follows: Adhesive Carrier rails (aluminium and PVC) Insulation (mineral fibre and expanded polystyrene) Fixings for insulation, Base coat materials, Reinforcing mesh, External finishes. This certificate replaces previous certificates 059/99 and 081/01 held by Knauf UK and extends the scope to include application of Knauf UK products as defined onto light gauge steel and timber framed backing walls. The systems have been assessed to confirm their suitability, within limitations, as weather-resistant external decorative finishes on new or existing walls of correctly detailed sound, clean vertical brick, block construction, with or without an existing sound render finish and cement board clad light gauge steel or timber frame construction above DPC level, in the United Kingdom. Page 1

2 Characteristics of each Knauf Render System (KRS) and Knauf Warm-Wall Insulation and Render System (KWIRS) and its method of application have been reviewed with respect to the Building Regulations, British and European Standards and other publications in the UK current at the date of certificate issue. The assessment is described in the following pages which form integral parts of this certificate and should be read in its entirety. 0 CONDITIONS OF USE 0.1 Knauf Render Systems and Knauf Warm-Wall Insulation and Render Systems (the Systems) are for use onto backing walls of new or existing buildings in locations in the UK, for forming a weather resistant external insulation and render system. The backing wall can be masonry, dense concrete or no - fines concrete, and above damp proof course level, timber frame or light gauge steel frame construction. 0.2 The number and type of fixings to masonry backing walls shall be determined in accordance with BS Structural fixings in concrete and masonry. Method of test for tensile loading. Where required consideration should also be given to BS Structural fixings in concrete and masonry. Method for determination of resistance to loading in shear. 0.3 Timber frame and light gauge steel frame backing walls shall be designed and constructed in accordance with BS 5268 Structural use of timber or BS 5950 Structural use of steelwork in building, or the relevant Eurocodes. 0.4 Specifiers shall ensure that backing walls and fixings to them are suitably designed to carry the weight of the systems and wind loads calculated in accordance with BS : Loadings on buildings: wind loadings. 0.5 The Systems shall not be considered as providing any contribution to the overall structural performance of the building or for support of any temporary structure. 0.6 Specifiers shall ensure that the fire performance classifications are adequate for the intended application and relate specifically to the System in use. 0.7 Any building having a floor more than 18 metres above the ground level surrounding the building shall be clad in a KWIRS incorporating either mineral fibre insulation or graphite impregnated expanded polystyrene (grey in colour), as these two construction options have been tested and comply with BR 135: 2013 Fire performance of external thermal insulation for walls of multi-storey buildings. 3 rd edition Annex A and Annex B. No other types of expanded polystyrene or combustible insulation types (as defined by reaction to fire classes B, C, D or E (European) or 0, 1, 2, 3 or 4 (National)) are permitted for use in the KWIRS on any building having a floor more than 18m above ground level. 0.8 Acoustic performance of the Systems has not been assessed. 0.9 The need for vapour control on external walls of framed buildings shall be assessed and the relevant action taken (e.g. the fitting of vapour control layers and/or breather membranes) to eliminate the risk of interstitial condensation Where NHBC approval is required with timber frame building system, a minimum 15mm wide cavity which is drained and ventilated is required. When used to clad a light gauge steel frame building system, a minimum 15mm wide cavity which is drained is required. The supporting framework to produce the required cavity and the ancillary components necessary for fire stopping, drainage and ventilation are not covered by this certificate as they are designed on a project specific basis. The ancillary components and framework selected should be agreed in advance with Knauf UK which operates a technical support service, to ensure that they are suitably durable and compatible with the KWIRS. Page 2

3 0.11 Frost resistant mortars shall be used below dpc level The Systems shall be stored, handled, installed and maintained strictly in accordance with the requirements of this certificate and Knauf s Technical Installation Manual as inspected by BRE Global The performance of the Systems depends on correct installation. The quality of installation achieved on site is not covered by this certificate and therefore it is recommended that the quality of installation and workmanship is subject to appropriate checks by a competent person Periodic inspections shall be made to confirm the condition of rendering and especially the sealants to ensure adequacy of the seal. Damage should be repaired promptly. Repairs shall be in accordance with the Knauf repair procedures 0.15 The Systems shall only be installed by operatives trained, approved and monitored by Knauf UK and the company shall continue to provide a technical consultancy service This certificate remains valid while the conditions contained in clause 6.1 are met and the European Technical Approvals listed in table 2.1 remain valid STATEMENT Knauf Render Systems and Warm-Wall Insulation and Render Systems are satisfactory for use within the stated limitations provided that they are used in accordance with the Certificate holder s instructions and the requirements of this certificate. CONFIRMATION For and on behalf of BRE Global Date of First Issue: January 2013 Date of Revision 8 th October 2015 Page 3

4 1. TECHNICAL SPECIFICATION 1.1 Description of Product General Knauf Render Systems (KRS) consist of a range of cementitious based ready coloured onecoat or two-coat mesh reinforced renders providing various surface textures and colours for application to suitable masonry, concrete and cement board clad steel and timber framed substrates Knauf Warm-Wall Insulation and Render Systems (KWIRS) additionally incorporate mineral fibre or expanded polystyrene insulation and associated fixings The products are described in Section 1.1 and some typical construction details are presented in Appendix A (Figures A1 to A4). The associated product performance parameters that have been evaluated are described in Section KRS and KWIRS have been assessed for use as a weather resistant decorative exterior finishes to masonry, concrete and brick & block, timber and steel frame backing walls. KWIRS additionally provided improved thermal performance. The system components which can be used in the combinations shown in Table 1.1 are described in the following paragraphs to Table 1.1 Combinations of system components Background Adhesive Carrier rail 1 Insulation Basecoat Finish coat Masonry None SM700 SM300 None None Expanded polystyrene Mineral fibre None UP210 Presto Timber or steel frame clad with cement board SM700 SM300 Plastic None Expanded polystyrene Mineral fibre Expanded polystyrene SM700 SM300 Noblo, SP260 or Conni S Addi S Aluminium Mineral fibre 1 Carrier rails are outside the scope of this certificate Adhesive and basecoats SM700 & SM300 Bonding reinforcing lime cement mortars with micro-fibres, fine additives and bonding agent for application to masonry, concrete, external wall insulation or cement board UP210 A water-resistant cement and lime mortar incorporating limestone or quartz particles supplied as a pre-blended powder for application to masonry and concrete. Page 4

5 1.1.3 Insulation materials Warm-Wall Mineral Fibre Wool Mineral fibre square edge slab to BS EN Thermal insulation products for buildings. Factory made mineral wool (MW) products. Specification. Board dimensions are 1200 x 600 mm and 800 x 625 mm, with thicknesses between 30 and 120 mm. Grooved boards (600 x 600 mm) are supplied for use with carrier rails Warm-Wall Polystyrene Expanded polystyrene board supplied in accordance with BS EN Thermal insulation products for buildings. Factory made products of expanded polystyrene. Specification. Boards are straight edged or tongued and grooved on two edges with dimensions 1000 by 500 mm, and thicknesses between 30 and 160mm. Grooved boards (500 x 500 mm) are supplied for use with carrier rails Warm-Wall Mineral Fibre Volamit Mineral fibre square edge slab to BS EN with combed cement based coating on the reverse. Board dimensions are 1200 mm x 200 mm, with thicknesses to match the standard mineral fibre and expanded polystyrene products are used to form horizontal and vertical fire stops where required A summary of the information provided for each insulation material in terms of product specification is presented in Table 1.2. Table 1.2 Typical properties of insulation used as part of Knauf Warm Wall systems Property Test Method Product standard - Mineral Fibre Wool BS EN Thermal insulation Mineral Fibre Volamit BS EN Expanded Polystyrene BS EN Density (kg/m 3 ) Thickness range (mm) Thermal conductivity l90/90 value (W/mK) BS EN Reaction to fire EN A1 A1 E Render systems There are four render systems comprising cement based one-coat or two-coat finishes. Base coats for two-coat finishes are UP210 on masonry and SM700 & SM300 on cement board Presto (one-coat finish) A one-coat scratch render system supplied as a pre-blended powder with 1.5 mm aggregate, based on white cement and lime with selected aggregates. For application in a thickness of mm for a rubbed-down finish and mm for a scratch coat finish Noblo (two-coat finish) A textured render finish coat supplied as a pre-blended powder based on white cement with selected marble aggregate. A textured finish of nominal thickness 1.5, 2 or 3 mm is obtained. Page 5

6 SP260 (two-coat finish) A textured render finish coat supplied as a pre-blended powder based on white cement with selected mineral aggregate. A textured finish of nominal thickness 1.5, 2, 3 or 5mm is obtained Conni S (two-coat finish) A silicone resin based textured render finish coat with selected mineral aggregates supplied ready-mixed. A smooth float or rolled finish of nominal finished thickness 1, 1.5, 2 or 3 mm is obtained Addi S (two coat finish) An acrylic version of the silicone resin based textured render finish coat with selected mineral aggregates supplied ready-mixed. A smooth float or rolled finish of nominal finished thickness 1.5, 2 or 3 mm is obtained Fixings back to backing wall There are a number of proprietary fixings that are supplied as part of the Knauf external wall insulation and render systems. The type and specification for the fastener is determined by the nature of the substrate, insulation thickness, and overall weight of the system, the exposure environment and fire performance. The fixings pins shall be stainless steel, nonferrous or other material that does not corrode but see clause Further information and advice shall be obtained direct from Knauf UK Mesh reinforcement Alkali resistant polymer coated glass fibre reinforcing mesh of glass fibre with a polymer coating for general reinforcement (160 g/m 2 or 200 g/m 2 ) Ancillary components (outside scope of the certificate) Plastic (PVC) and aluminium supporting rails and metal fixings for securing the Knauf Warm- Wall Rail System (KWRS) insulation (expanded polystyrene and mineral fibre respectively) Alkali-resistant trims and cills polyvinyl chloride (PVC), stainless steel or aluminium Silicon Resin Equaliser Paint for application to external wall areas where exposure conditions may lead to differential weathering of coloured renders. 2. PRODUCT PERFORMANCE 2.1 General The performance of components and systems that have been assessed are described in the following sections of the certificate (see certificate sections 2.2 to 2.8 for product and system testing details). 2.2 Structure The Knauf Systems are considered to be non-loadbearing and therefore do not make any contribution to the structural performance of the building The type of mechanical fastener used depends on the nature of the backing wall and shall be specified by the designer/structural engineer for each individual project and is therefore outside the scope of this certificate. Page 6

7 2.3 Fire General Where fire performance testing and assessments have been carried out for a specific Knauf System and/or the individual components, the results are tabulated in the following sub sections (see Table 2.1). For further information about the fire test reports and any fire assessment reports cited in this certificate, please contact the certificate holder Fire resistance The overall fire resistance for external walls onto which Knauf Systems have been installed depends on the nature of the backing wall and is therefore outside the scope of the certificate Reaction to fire Insulation and Render (reaction to fire) Reaction to fire test data for the Noblo, SP620, Conni S and Addi S external finishes applied onto Mineral Fibre and Expanded Polystyrene insulation are presented in Table 2.1. Table 2.1 Reaction to fire classification summary table for Knauf external wall insulation and render systems for application to masonry and concrete backing walls each incorporating Knauf reinforcing mesh Insulation type Finish Mineral fibre Expanded polystyrene Classification Reference Classification Reference Noblo 4 B-s1, d0 1,2 BRE Test B-s1, d0 SP ,3 Report Conni S 5 B-s1, d0 1,2 Issue 1 B-s2, d0 1,3 ETA-09/0284 Addi S 5 A2-s2, d0 ETA 13/0542 B-s2, d0 1,3 ETA-13/0555 Notes. 1. European classification in accordance with BS EN Test data obtained for insulation maximum density 150 kg/m 3 3. Test data obtained for insulation maximum density 15 kg/m 3 4. Maximum declared organic content: base coat 2.7%, finishing coat 2.0% 5. Maximum declared organic content: base coat 2.7%, finishing coat 7.1% Fire spread on external walls Any building having a floor more than 18 metres above the ground level surrounding the building shall be clad in a KWIRS incorporating either mineral fibre insulation or graphite impregnated expanded polystyrene (grey in colour), as these two construction options have been tested and comply with BR 135: 2013 Fire performance of external thermal insulation for walls of multi-storey buildings. 3 rd edition Annex A and Annex B. No other types of expanded polystyrene or combustible insulation types (as defined by reaction to fire classes B, C, D or E (European) or 0, 1, 2, 3, 4 (National)) are permitted for use in the KWIRS on any building having a floor more than 18m above ground level Other fire related construction detail requirements Fixings One fire resistant (stainless steel) fixing per square metre of insulation board/slab is required as part of the fire performance requirements, further guidance is provided in BRE report BR 135. Page 7

8 Cavities Where cavities are present, they shall be separated by horizontal and vertical fire barriers at locations defined in the supporting documents to the building regulations. 2.4 Environment Weather resistance The Systems will provide a weather resistant external wall insulation cladding to new and existing backing walls of brick and block masonry, dense and no fines concrete and sheathed light gauge steel and timber frame construction provided that the external finish and construction details at openings, fixtures and penetrations are installed and maintained in accordance with the requirements of this certificate and the supplier s installation instructions For timber frame and light gauge steel frame the systems shall comply with the appropriate structural requirement from the relevant parts of BS 5268 Structural use of timber or BS 5950 Structural use of steelwork in building respectively to ensure water penetration resistance is maintained Where the wind driven rain exposure classification is very severe (refer to BS Code of practice for the use of masonry. Materials and components, design and workmanship and BS 8104 Code of practice for assessing exposure of walls to wind-driven rain) further information to ensure that appropriate construction detailing is provided under these exposure conditions can be found in BR 262 (1994) Thermal insulation - avoiding risks. If in doubt, further advice from the certificate holder should be sought. Condensation Risk Assessment and Interstitial Condensation For KWIRS used for dwellings the project designer shall determine the condensation risk assessment in accordance with BS 5250 Code of practice for control of condensation in buildings The condensation risk assessment shall be carried out in accordance with BS EN ISO Hygrothermal performance of building components and building elements. Internal surface temperature to avoid critical surface humidity and interstitial condensation. Calculation methods Project specific condensation risk assessments are required for dwellings Advice on construction detailing for thermal insulation materials is provided in BRE publication BR 262 Thermal insulation avoiding the risks (Third edition) Steel and timber framed construction shall be designed to avoid the accumulation of condensation. Once the design process is completed additional insulation shall not be placed within the frame cavity or against the inner face of the construction neither shall insulation be removed from the KWIRS For steel and timber framed construction it is essential that any vapour control layer on the warm side of the structure is fully effective. Advice on U-value calculation modifications can be found in BRE Digest 465 U-values for light steel frame construction. 2.5 Safety in use Wind loading Mechanical tests on KWIRS have shown that the systems can adequately resist wind forces anticipated in the UK for locations where suction on the system is no greater than 2kN/m 2. The values shall be calculated in accordance with BS Loading for buildings. Code of practice for wind loads and suitable fixings designed and specified for each application. Page 8

9 2.5.2 Impact Resistance The KWIRS has adequate resistance to impact damage in situations other than those with public access below a line 1.5m above adjacent ground or floor levels exposed to pedestrians with little incentive to exercise care. Additional reinforcement is required below this level. 2.6 Noise Knauf UK does not claim any acoustic performance for its external wall insulation and render systems. 2.7 Energy Knauf External Wall Insulation component can provide additional thermal resistance when applied to external walls. U-value calculations shall be carried out for external wall constructions in accordance with BS EN ISO 6946 Building components and building elements. Thermal resistance and thermal transmittance. Calculation method using the thermal conductivity values in Table Advice on conventions for U-value calculations is provided in BRE Report 443 Conventions for U-value calculations. For light gauge steel frame, reference should be made to BRE Digest 465. Knauf UK provides U-value calculations for project specific configurations upon request Typical U-values for solid external wall construction are given in Table 2.2. Table 2.2 Typical U-values for KWIRS applied to solid external brick wall construction Insulation type Insulation thickness (mm) U-Value (W/m 2 K) Mineral fibre Expanded polystyrene External wall construction details (from outside to inside) External surface Render (thin coat render) Fixings Insulation 229mm solid brickwork 12.5mm plasterboard Internal surface 2.8 Durability Hygrothermal testing for KWIRS has been carried out in accordance with ETAG-004 External Thermal Insulation Composite Systems (ETICS) with Rendering, for Systems incorporating expanded polystyrene and Conni S, Addi S, Noblo and SP260 finishes using standard alkali resistant glass fibre reinforcement mesh. The systems were assessed as freeze/thaw resistant Periodic maintenance checks should be undertaken by the building owner on the external render finish particularly on joints, at the junctions with flashings and sills, and around any penetration through the render, e.g. for plumbing, flues, etc as for any render system. The Systems shall be maintained in accordance with the Knauf UK Maintenance and care/repair manual The Systems can be considered to have a design working life of at least 25 years provided that the system has been installed in accordance with the requirements of the manufacturer and of this certificate and that any accidental damage to the finish is effectively repaired. Page 9

10 3. BUILDING REGULATIONS 3.1 General The Knauf External Wall Insulation and Render Systems when used in accordance with this certificate and the certificate holder s installation instructions can assist in demonstrating that the works within which they are installed will meet the stated requirements of the following building regulations and standards: 3.2 For England - The Building Regulations (2010), incorporating the latest amendments to the Approved Documents for use in England. Regulation 4 Regulation 6 Regulation 7 A1 B Vol. 1 B Vol. 2 C2 L1A L1B L2A L2B Requirements relating to building work Requirements relating to material change of use Materials and workmanship Loading Fire safety Dwellinghouses Fire safety Buildings other than dwellinghouses Resistance to moisture Conservation of fuel and power in new buildings Conservation of fuel and power in existing buildings Conservation of fuel and power in new buildings other than dwellings Conservation of fuel and power in existing buildings other than dwellings 3.3 For Wales - The Building Regulations (2010), incorporating the latest amendments to the various Approved Documents for use in in Wales. Regulation 4 Regulation 6 Regulation 7 A1 B Vol. 1 B Vol. 2 C2 L1A L1B L2A L2B Requirements relating to building work Requirements relating to material change of use Materials and workmanship Loading Fire safety Dwellinghouses Fire safety Buildings other than dwellinghouses Resistance to moisture Conservation of fuel and power: New dwellings Conservation of fuel and power: Existing dwellings Conservation of fuel and power: New buildings other than dwellings Conservation of fuel and power: Existing buildings other than dwellings 3.4 The Building (Scotland) Regulations 2004 incorporating the latest amendments to the various Technical Handbooks Regulation 8 Regulation 9 Domestic 1 Structure 2 Fire 3 Environment 6 Energy Fitness and durability of materials and workmanship Building standards applicable to design and construction Page 10

11 Non-Domestic 1 Structure 2 Fire 3 Environment 6 Energy 3.5 The Building (Northern Ireland) Regulations 2012 incorporating the latest amendments to the various Technical Booklets B C D E F1 F2 Materials and workmanship Site preparation and resistance to contaminants and moisture Structure Fire Safety Conservation of fuel and power in dwellings Conservation of fuel and power in buildings other than dwellings 3.6 Construction (Design and Management) CDM Regulations Construction (Design and Management) Regulations 2015 Construction (Design and Management) Regulations (Northern Ireland) 2007 (as amended) The certificate should form part of the information used by the client, CDM coordinator, designer and contractors to discharge their responsibilities under these Regulations. 4. INSTALLATION/PRACTICAL APPLICATION 4.1 General The performance of the Systems depends on correct installation. They shall be installed strictly in accordance with the Certificate holder s installation instructions, taking account of the delivery, storage and handling requirements of this certificate and the structural design engineer. The quality of installation actually achieved on specific sites is not covered by this certificate. Therefore it is recommended that the quality of installation and workmanship is subject to appropriate checks by a competent person for each installation. 4.2 Approved Installers Installation of the Systems shall be carried out in accordance with the Knauf Technical Installation Manual and shall only be carried out by installers trained, approved, registered and monitored by Knauf UK. 4.3 Storage, handling and packaging Products shall be stored in accordance with the Knauf Technical Installation Manual and with reference to the technical data sheet and materials safety data sheet for each product. Page 11

12 5. TECHNICAL APPRAISAL 5.1 Performance Tests Performance tests and inspection of test data have been carried out to determine the properties and performance of the Systems when applied to external walls and include the following: Resistance to wind loading Bonding properties Performance in relation to fire - Reaction to fire Resistance to water penetration and water vapour transmission Resistance to impact Thermal properties Durability - Thermal cycling - Resistance to freeze/thaw cycles Table 5.1 Summary of product performance for external wall insulation and render systems Insulation type Characteristic Test method Product Mineral fibre Wool Volamit EPS Reaction to fire 1 EN Insulation A1 A1 E Reaction to fire 2 See Table 2.1 Noblo B-s1,d0 B-s1,d0 SP260 Conni S B-s1,d0 B-s2,d0 Addi S A2-s2, d0 Fire resistance N/A See Note 2 Wind load resistance BS System + or 2kN/m 2 Impact (hard body) BS 8200 System See Example calculations show Condensation and U- BS 5250 & no harmful condensation risk, System value calculations EN ISO 6946 U-value calculations are project specific Hygrothermal test ETAG 004 System Pass At least 25 years Water vapour transmission rates of finishes ETAG 004 Render Equivalent air thickness sd < 1.0m Freeze/thaw ETAG 004 Pass At least 25 years 1 See Section It is the responsibility of the specifier to ensure that the fire performance classifications are adequate for the intended application and relate specifically to the System in use 5.2 Installation Assessment has been made of the products and practicality of installation which was found to be suitably addressed by the certificate holder s installation instructions. Existing installations for the Systems have been inspected. Page 12

13 5.3 Quality Control Traceable records are maintained by the certificate holder. The manufacturer carries out checks at regular intervals to ensure the quality of the product is maintained within the defined product specification. BRE Global undertakes regular monitoring of the factory production against an agreed Quality plan for each product Knauf UK operates processes and procedures that are in accordance with ISO 9001 Quality Management Systems. 5.4 Standards The following British Standards and Codes of Practice, and other documents have been referred to for this assessment: BS EN 12667:2001 BS EN 13162:2008 BS EN 13163:2008 BS EN :2007 +A1:2009 BS EN ISO 6946:2007 BS EN ISO 13788:2002 BS EN ISO 9001:2008 BS 5250:2011 BS :2002 BS :2005 BS :1993 BS :1986 BS :1998 BS :1997 BS 8104:1992 BS 8200:1985 Thermal performance of building materials and products. Determination of thermal resistance by means of guarded hot plate and heat flow meter methods. Products of high and medium thermal resistance. Thermal insulation products for buildings. Factory made Mineral Fibre (MW) products. Specification Thermal insulation products for buildings. Factory made products of expanded polystyrene (EPS). Specification Fire classification of construction products and building elements. Part 1: Classification using data from reaction to fire tests Building components and building elements. Thermal resistance and thermal transmittance. Calculation method Hygrothermal performance of building components and building elements. Internal surface temperature to avoid critical surface humidity and interstitial condensation. Calculation methods. Quality management systems. Requirements Code of practice for control of condensation in building Structural use of timber. Code of practice for permissible stress design, materials and workmanship Code of practice for the use of masonry. Materials and components, design and workmanship Structural fixings in concrete and masonry. Method of test for tensile loading. Structural fixings in concrete and masonry. Method for determination of resistance to loading in shear. Structural use of steelwork in building. Code of practice for design of cold formed thin gauge sections Loading for buildings. Code of practice for wind loads Code of practice for assessing exposure of walls to wind-driven rain Impact resistance of opaque wall components Page 13

14 European Technical Approval Guidelines: ETAG 004 External Thermal Insulation Composite Systems (ETICS) with Rendering BRE Publications BR 135:2003 BR 262:2002 BR 443:2006 BR 465:2002 Fire performance of external thermal insulation for walls of multi-storey buildings. 2nd edition Thermal insulation avoiding the risks (Third edition) Conventions for U-value calculations U-values for light steel frame construction 6. CONDITIONS OF CERTIFICATE ISSUE 6.1 Validity This certificate will be valid for a period of three years from date of first issue. It will remain valid in so far as: (a). The materials and method of manufacture are unchanged or BRE Global has assessed any changes and found them to be satisfactory. (b). The designs and specifications are unaltered from those examined by BRE Global. (c). The certificate holder continues to have the product checked by BRE Global. 6.2 Health and Safety This certificate and the recommendations herein do not purport in any way to restate the requirements of the Health and Safety at Work Act 1974 or any statutory or common law duty of care which exists now or in the future: nor is compliance with these recommendations to be assumed as satisfying the requirements of the said Act or any existing or future statutory or common law duty of care. 6.3 References to Other Documentation Where reference is made in this certificate to any Act of Parliament, Regulation, Code of Practice, British or other Standard or other publications, it shall be construed as reference to such publication in the form in which it is in force at the date of issue of the certificate. 6.4 Patents BRE Global make no representational warranty that any patent or similar industrial property right is valid or that the manufacture, use, sale, lease or any other dealing or disposition of the product in whole or in part is not an infringement of any patent or industrial property right not owned by the certificate holder. 6.5 Confirmation of validity Confirmation that the certificate is current may be obtained from the BRE Global website ( BRE Global 2015 Page 14

15 APPENDIX A - Figure A1 Typical masonry backing wall (Informative) Page 15

16 APPENDIX A - Figure A2 Typical framed construction wall (with cavity) (Informative) Page 16

17 APPENDIX A - Figure A3 Typical junction detail at roof level (Informative) Page 17

18 APPENDIX A - Figure A4 Typical junction detail at floor level (Informative) Page 18