Celotex cavity wall insulation

[Bluenoze]

Hi

As above, Celotex as a cavity wall insulation - How thick does this need to be to meet Building Regulations? 25/50/75 or 100mm?

Thanks
Bluenoze

 

[^woody^]

it depends on what materials are being used in the rest of the wall

 

[Bluenoze]

ok...This is the best description I could come up with - outside skin is standard brick, inside is the larger "solid concrete grey blocks" (Sorry dont know the tech term), will then look to plasterboard (not sure if the foil backed stuff is needed), then skim (that wall) (no electrical on it but there will be a radiator under the window (garage conversion)

Was just curious as to what size was needed as a minimum

THANKS!

 

[freddiemercurystwin]

Probably about 40-50mm but as mentioned depends on the spec of the blocks.

 

[Bluenoze]

Freddy - Thanks!