Cavity Barriers: What Does Good Look Like?

Cavity Barriers: What Does Good Look Like?

Cavity barriers provide passive fire protection. They are installed in concealed spaces, such as wall cavities, to inhibit the passage of smoke and flames. It is important for the cavity barrier to be installed correctly, to make sure it stays in-situ to provide the correct fire performance. Following the tips in this article will ensure the correct installation of cavity barriers.

Installation Guidance for Cavity Barriers:

The cavity barrier must be of the correct size for the cavity width (including compression where appropriate). The barrier must fully fill the cavity from external brick to internal block.

The cavity width must be accurate. The cavity insulation should be cut back where the barrier will be located.
At the end of a run, or at a corner, lengths of barrier should be cut to the required length, and then tightly butt jointed ensuring no gaps remain. Barriers should not be bent around corners.
Excess polythene should be removed from joints.
The cavity must be clear from debris.

The appropriate compression or friction fit ensures the barrier will not be dislodged in the event of a fire.

You should not attempt to squash the barrier before installation. Although this can make the barrier easier to fit, it is likely to cause gaps and may damage the barrier, resulting in reduced performance.

For further guidance, please speak to our technical team on 0113 252 9428