Fire Rated Cavity Closers

[ADLIan]

1 hour ago, Mr Punter said:

 

I agree.  Do you think the guidance is aimed at timber and metal frame type walls?

The exception is for masonry walls only - 2 leaves at least 75mm thick. Note this is only the English Regs - there is no similar exemption in Scotland, Wales or Ireland that I am aware of. Timber or steel framed construction is NOT included. The issue with a fully filled cavity (hence no cavity!) is covered by not having to seal the top of the cavity. I'm sure this guidance is based on risk and the fire 'engineering' related to single houses and fire/smoke in masonry cavity walls.

 

I wonder if the above diagram may have been better if it called them 'cavity closers' with a nod to the thermal requirements of AD L. I note it does not use the phrase 'cavity barriers'.