Rooflights and Regulations for Fire

In the UK, Building Regulations Approved Document B (2006 edition amended 2007) sets out the rules for fire safety of buildings. Section B2 covers internal fire spread, and applies to the linings of both the roof and walls of buildings. In general these are surface spread of flame requirements to BS476 Part 7 (typically Class 1 and Class 3) or to BS EN 13501 Part 1 (typically Class C-s3,d2 or Class D-s3,d2). Section B4 covers external fire spread and applies to external coverings or roofs and walls; in general these are fire resistance requirements to BS476 Part 3 (typically AA and AB) or to BS EN 13501 Part 5 (typically BROOF(t4)).


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