Recent content by Red Squirrel

Thanks for replying. I was worrying about having a VCL sandwich and any moisture buildup inside.

I'd like to add additional insulation to a vaulted ceiling with exposed rafters by adding 70mm foil backed celotex between the rafters and plasterboarding over. My concern is that there is an existing VCL (polythene sheet) that I'd be insulating underneath. The existing roof consists of 80mm...