POLTERM MAX PLUS FOR USE IN RAINSCREEN CLADDING SYSTEMS
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Agrement Certificate 19/5672 Product Sheet 1 Saint-Gobain Isover UK Limited Whitehouse Industrial Estate Runcorn Cheshire WA7 3DP Tel: 0115 945 1143 e-mail: isover.enquiries@saint-gobain.com website: www.isover.co.uk This Agrement Certificate Product Sheet(1) relates to Polterm Max Plus for use in Rainscreen Cladding Systems, a mineral wool insulation slab for use as thermal insulation on new and existing timber- or steel-frame walls or masonry walls, in domestic and non-domestic buildings. The product is used in conjunction with ventilated cladding systems. (1) Hereinafter referred to as 'Certificate'. CERTIFICATION INCLUDES: • factors relating to compliance with Building Regulations where applicable • factors relating to additional non-regulatory information where applicable • independently verified technical specification • assessment criteria and technical investigations • design considerations • installation guidance • regular surveillance of production • formal three-yearly review. KEY FACTORS ASSESSED Thermal performance — the product has a declared thermal conductivity (Ad) of 0.035 W-m-1-K-1 (see section 6). Condensation risk — the product can contribute to limiting the risk of condensation (see section 7). Behaviour in relation to fire — the product is classified as Class A1 in accordance with BS EN 13501-1: 2007 (see section 8). Durability — the product will have a life equivalent to that of the wall structure in which it is incorporated (see section 12). 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 Agrement Certificate by either referring to the BBA website or contacting the BBA direct. Any photographs are for illustrative purposes only, do not constitute advice and should not be relied upon. British Board of Agrement Bucknalls Lane tel: 01923 665300 Watford clientservices@bbacerts.co.uk

In the opinion of the BBA, Polterm Max Plus for use in Rainscreen Cladding Systems, if installed, used and maintained in accordance with this Certificate, can satisfy or contribute to satisfying the relevant requirements of the following Building Regulations (the presence of a UK map indicates that the subject is related to the Building Regulations in the region or regions of the UK depicted): The Building Regulations 2010 (England and Wales) (as amended)Requirement: B3(1)(4) Internal fire spread (structure) Comment: The use of the product is unrestricted by this Requirement. See section 8...

Construction (Design and Management) Regulations 2015 Construction (Design and Management) Regulations (Northern Ireland) 2016 Information in this Certificate may assist the client, designer (including Principal Designer) and contractor (including Principal Contractor) to address their obligations under these Regulations. See section: 3 Delivery and site handling (3.3) of this Certificate. NHBC Standards 2019 In the opinion of the BBA, Polterm Max Plus for use in Rainscreen Cladding Systems, if installed, used and maintained in accordance with this Certificate, can satisfy or contribute to...

Technical Specification 1 Description 1.1 Polterm Max Plus for use in Rainscreen Cladding Systems comprises slabs of rigid stone mineral wool (MW) treated with a water-repellent additive, with a black glass tissue facer on one face. The slabs have the nominal characteristics shown in Table 1. Table 1 Nominal characteristics Length (mm) Width (mm) Thickness (mm)(1) Edge profile (1) Other slab thicknesses within the above range are available on request. 1.2 Ancillary items for use with the product, but outside the scope of this Certificate:      rainscreen cladding panel and subframe...

Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on Polterm Max Plus for use in Rainscreen Cladding Systems. Design Considerations 4 Use 4.1 Polterm Max Plus for use in Rainscreen Cladding Systems is effective in reducing the U value (thermal transmittance) of external walls of timber-frame, steel-frame or masonry buildings. It is essential that such walls are designed and constructed to incorporate the normal precautions against moisture ingress, including the use of a breather membrane over the timber sheathing...

6 Thermal performance 6.1 Calculations of the thermal transmittance (U value) should be carried out in accordance with BS EN ISO 6946 : 2017 and BRE Report BR 443 : 2006, using the insulation’s declared thermal conductivity* (λD) of 0.035 W·m–1·K–1. 6.2 The U value of a completed wall construction will depend on the insulation thickness, number and type of fixings, the insulating value of the substrate and its internal finish. Calculated U values for example constructions are given in Tables 2 to 4. Table 2 Example U values — timber frame rainscreen system(1)(2) U value (W·m–2·K–1) 0.18...

Polterm Max Plus thickness (mm) (3) (3) (3) (1) Construction, external to internal: 10 mm rainscreen cladding, open – fully ventilated 50 mm clear cavity, Isover Polterm Max Plus, 150 mm reinforced concrete (1% steel), 15 mm cavity (20% adhesive bridge) and 15 mm plasterboard (λ = 0.25 W·m–1·K–1). (2) A fixing correction factor (ΔUf) of 0.1 W·m–1·K–1 has been applied, to allow for the thermal bridging of the rainscreen brackets. (3) Additional insulation required. Junctions 6.3 Care must be taken in the overall design and construction of junctions with other elements and openings to...

8 Behaviour in relation to fire The product is classified* as A1 in accordance with BS EN 13501-1 : 2007(1). It is therefore noncombustible as defined in the national Building Regulations and is not subject to any restriction on building height or proximity to boundaries. (1) Exova Warrington fire. Report No WF 401343, 25 July 2018. Copies can be obtained from the Certificate holder. 9 Strength and stability 9.1 Although the product will not be directly exposed to wind load, it will experience substrate movement and therefore each installation should be designed to withstand, without damage...