Technical Booklet E Fire Safety·Page 134·5.2B
Combustibility of External Walls – Applicable Buildings
Buildings other than those in Regulation 23(4) must comply with provisions covering external surfaces, materials and products, and cavities and cavity barriers as set out in paragraphs 5.3 to 5.4B.
The external walls of buildings other than those described in Regulation 23(4) of the Building Regulations should achieve all the provisions given in paragraphs 5.3 to 5.4B which provide guidance on all of the following –
(i) external surfaces;
(ii) materials and products; and
(iii) cavities and cavity barriers;
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