Current
Core Supplement
Certificate
Relates to Celotex TB4000, GA4000, and XR4000 PIR Insulation Boards for Timber-Frame Dwellings, composite foil-faced rigid polyisocyanurate (PIR) foam boards for use as insulation in new and existing external cavity walls of conventional timber-frame dwellings, with a masonry outer leaf, with height restrictions. The products may be installed between studding, as a dry-lining, or as insulated sheathing. The key factors assessed include mechanical resistance and stability, safety in case of fire, hygiene, health and the environment, safety and accessibility in use, protection against noise, energy economy and heat retention, sustainable use of natural resources, and durability.
Date of issue: 24 January 2025. Supersedes Certificate No. 16/5352.
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.
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