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3.14 ROOFS

3.14.1 Roof construction

a. The surface of materials for roof covering and roof construction shall have a surface spread of flame rating not lower than BS Class 1, or Class A when tested in accordance with ASTM E108.

b. Composite panel used as roof covering shall comply with the relevant clauses of the Code of Practice for Fire Precautions in Buildings.

c. Roof covering containing plastic shall comply with the relevant clauses of the Code of Practice for Fire Precautions in Buildings.

3.14.2 Roof junction with separating wall and compartment wall

At the junctions with separating wall or compartment wall, roof construction shall comply with the relevant requirements under Cl.3.6.3 and Cl.3.7.4 respectively.