Upper floors: Fire protection
The purpose of fire protection is not to render a floor non-combustible, but to ensure that it will resist collapse for a sufficient period of time to allow evacuation of the building. The Building Regulations require that dwelling houses with floors within 5m of ground level have 30 minutes’ fire resistance and 60 minutes’ fire resistance to all the floors in dwelling houses with a floor above 5m. Typically, 30 minutes can be achieved with one 12.5mm layer of proprietary plasterboard skimmed or self-finished and 60 minutes with two layers of 12.5mm proprietary plasterboard with the joints staggered and filled.
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