How thick does a cavity wall need to be?

northender

Thanks m13 and bespoke. I feel much more positive about everything now that I know that there are more options than we realised. Think we need to get in touch with some more enthusiastic builders who will think a bit more laterally!

northender

Me again! Have just checked the building regs which specifies 60mm celotex to the walls. I know this is a type of insulation, does this make a difference to the figures you have quoted?

woodbutcher_2

That's a bit of a sweeping statement.As a builder i find that offensive.

adr0ck

northender wrote: »

Me again! Have just checked the building regs which specifies 60mm celotex to the walls. I know this is a type of insulation, does this make a difference to the figures you have quoted?

celeotex are a manufacturer of rigid foam insulation (like kingspan)

a guide to most of the different makes of insulation available and pack sizes etc is available here

http://www.enconinsulation.com/pdfs/building.pdf

note: rigid foam insulation is more expensive than mineral wool