The potential for a fire in a multi-storey building to break out through the facade and then to rapidly spread across external cladding is addressed in Approved Document B. This states that:
"The external envelope of a building should not provide a medium for fire spread if it is likely to be a risk to health and safety. The use of combustible materials in the cladding system and extensive cavities may present such a risk in tall buildings."
Approved Document B addresses fire safety precautions which must be adhered to, to ensure the safety of occupants, firefighters and those close to the building in the event of a fire.
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