The timbers are about 70mm deep so I could put 50mm of celotex, then I would have 20mm void to fit backbox, as long as having the void is ok in term of damp.
Hi, I am trying to figure out the best way to insulate the timber frame and roof part of my bay windows. The external surface is render and then there is a membrane below this. I was planning on fitting celotex/ kingspan in-between the timbers, taping the joints then putting visqueen/ moisture barri...
Hi, In the process of house renovation, bedroom has timber frame bay window with plug socket in but no insulation in cavity. Naturally I want to insulate this during the refurb. My plan was to put kingspan/ celotex between timbers, then tape joints then visqueen over before 12.5mm boarding ready for...
