Cold smoke seals

In addition to the fire resistance of the door and its assembly, it is also vital, in order to protect escape routes and prevent smoke damage to the building, that the door limits the spread of smoke. This is achieved by ensuring that the door effectively self-closes and is fitted with two types of seal an intumescent strip that expands when it becomes hot and forms a fire resisting seal around the door and a cold smoke seal which is normally in the form of bushes or a felt material, which prevents the movement of cold smoke. 

The recommendations arising from the findings would therefore relate to the provision of intumescent strips and where appropriate cold smoke seals, to bring the service riser doors/door sets up to British Standard 476 (Priority 3). 

Compartments and doors. The RP must take measures to ensure all fire resisting walls and doors are kept in good order, walls, ceilings and floors are not breached and fire doors have appropriate intumescent strips, cold smoke seals and closing devices [4.(1)(a)j. 

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