7.2 Pitched roofs

Also see:

6.8

7.2.16 Fire-stopping and cavity barriers

Pitched roofs shall be constructed to provide adequate fire resistance and separation.

Fire-stopping should be provided in accordance with the Building Regulations, including, at the junction between a compartment wall and roof and be extended into any eaves.

When providing fire-stopping:

  • gaps between compartments should be fire-stopped, using materials which achieve the same level of fire resistance as the compartment wall
  • compartment walls should stop approximately 25mm below the top of adjacent roof framing, and a soft fire-stopping material, should be used to allow for movement in roof timbers and prevent ‘hogging’ of the tiles.

Cavity barriers should be provided in accordance with the Building Regulations, including, at the edges and junctions of cavities.

When providing cavity barriers, they should be:

  • sized appropriately for the cavity
  • tightly fitted to a rigid construction
  • mechanically fixed in position.

Combustible material, such as roof timbers and sarking felt, should be kept away from heat sources.

Last updated: 2nd January 2024

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