17 Cavity closers and barriers

This lecture looks at the important topic of cavity barriers and closers and discusses how they help restrict the passage of fire within a wall.

[@Sam-jm7tx]

Thank you for the useful information.
is there a need to install cavity closers horizontally parallel with the wall plate where the roof rafters will be seating?
Many Thanks

[@Ramstam]

Hi, thanks for the question. Where the cavity meets the top of the wall it is necessary to close it. Normally this can be done with a fire proof board (calcium silicate) laid over the top of each leaf or by using proprietary closer. In addition, there should be cavity closers at each floor level of the building is more than one storey high. A lot depends on the local building regulations or codes so make sure you check. Cheers.