we have a dormer bungerlow and the upstairs bedrooms are cold so need to upgrade the insulation.
The dormer cheeks and roof are built using 3x2 so this limits how much insulation i can get in. At the moment there is only a thin layer of fiberglass.
My question is if i use celotex will i need to leave an air gap? There doesn't seem to be soffit vents.
i've looked at rockwool flexi but im unsure how much this would compress so unsure what thickness i could get in or would i need an air gap with rockwool as well.
Any help will be greatly appreciated as im getting more and more confused about all the different types of insulation.
The dormer cheeks and roof are built using 3x2 so this limits how much insulation i can get in. At the moment there is only a thin layer of fiberglass.
My question is if i use celotex will i need to leave an air gap? There doesn't seem to be soffit vents.
i've looked at rockwool flexi but im unsure how much this would compress so unsure what thickness i could get in or would i need an air gap with rockwool as well.
Any help will be greatly appreciated as im getting more and more confused about all the different types of insulation.