Passive fire protection bulletins
- Sheet
- PF-80
- Subject
- Bulletins
- Scope
- England, Scotland, Wales
- Prices read
- November 2026
What is a fire batt and when is it used?
A fire batt is a dense stone wool board, coated on both faces with an ablative coating, cut to fill a large opening in a fire-resisting wall or floor where several services pass through. It is sealed at every edge and around every service with an intumescent or ablative sealant. A single 50 mm batt is typically rated up to 2 hours, depending on the services and the opening, and it must be installed exactly as tested.
Read itFire collars: when does a pipe need one?
A fire collar is a steel shell filled with intumescent material that clamps around a plastic pipe where it passes through a fire-resisting wall or…
2 November 2026
What is a higher-risk building?
In England, a building in occupation is a higher-risk building under the Building Safety Act 2022 if it is at least 18 metres tall or has at least 7…
2 November 2026
How often do fire doors need to be inspected?
In England, in blocks of flats with a storey over 11 metres, communal fire doors must be checked at least every three months and flat entrance doors…
2 November 2026
What is a type 4 fire risk assessment?
A type 4 fire risk assessment is the most thorough of the four types described in the national guide Fire Safety in Purpose-Built Blocks of Flats. It…
2 November 2026
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