Document Status
Withdrawn, Document not available for download
Supplement
Core Supplement
Series
Certificate
Abstract
Relates to flexible three-layer polypropylene sheet materials for use on warm non-ventilated and cold ventilated pitched roofs as roof tile underlays. Key factors assessed were weathertightness, risk of condensation, wind loading, strength and durability.
History
Certificate withdrawn May 2025.
First issue, dated 9th May 2019.
Subjects
-
Roofs
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Building structure
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Sarking/roof lining
Publisher History
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.
Information
NBS
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.
Accuris
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