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- 29 Dec 2010
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Our external walls have 90cm internal stud frame infilled with rockwool, 18mm sterling board, a 40mm gap and a brick skin. It doesn't meet thermal regs for an internal garage to room conversion.
Our architect specified removing the inner plasterboard, putting in foam boards then adding 42mm kingspan over that.
Question: I think there may be not enough advantage to just replace existing rockwool with kinspan insulation boards, especially as good fitting of such boards needs a lot of work. Is it just as good to leave the rockwool and plaster board and clap some 75mm or thicker kingspan on top of that?
Our architect specified removing the inner plasterboard, putting in foam boards then adding 42mm kingspan over that.
Question: I think there may be not enough advantage to just replace existing rockwool with kinspan insulation boards, especially as good fitting of such boards needs a lot of work. Is it just as good to leave the rockwool and plaster board and clap some 75mm or thicker kingspan on top of that?