Withdrawn, Document not available for download
Relates to slotted or tongue-and-groove expanded polystyrene boards, for use as insulation between and over timber pitched roofs of buildings. Key factors assessed were thermal performance, condensation, behaviour in relation to fire and durability.
Superseded by the second issue, dated 5th July 2019. Date of first issue: 17th September 2014. Originally certificated on 29th October 1997.
The British Board of Agrément have been providing authoritative and independent information on the performance of building products for over 40 years. The certificates they produce contain data on durability, installation and compliance with Building Regulations.
NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.
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