Quick answer
How are fire-stopping and insulation coordinated at penetrations?
Thermal insulation runs up to a fire barrier and stops, where fire-stopping takes over to seal the penetration and protect the compartment. The split is set out in the fire strategy drawings, with insulation and fire-stopping installed by separate specialists and inspected at the interface before the wall closes.
Where does insulation stop at a fire barrier?
Thermal insulation is taken to the face of the fire-rated wall or floor slab and finished neatly. The fire-stopping — collars, wraps or intumescent seals — is then fitted within the penetration to restore the compartment. Insulation is never run continuously through a fire barrier unless the specification calls for it.
Who is responsible for the fire-stopping?
Fire-stopping is normally a separate trade from insulation, installed by a specialist contractor to the certified system. The insulation contractor's job is to finish at the interface and leave the penetration clear for the fire-stopping, not to provide the seal itself.
How is the interface inspected?
Before the wall or ceiling closes, the interface is inspected to confirm insulation is finished correctly and the penetration is ready for fire-stopping. Photographs are taken for the handover pack where required, so the fire strategy is demonstrably met.
What about insulated ductwork crossing compartments?
Where ductwork passes through a fire compartment, fire dampers and rated sleeves are installed as part of the fire strategy. The insulation is detailed to suit the damper arrangement, so access for testing and maintenance of the damper is kept clear.
What records are kept?
The fire-stopping interface is recorded in the same handover documentation as the insulation, with locations and certified products noted. This supports the building's fire safety information under the Building Safety Act.
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