I am moving into a small cabin for the winter and need some insulation ideas. Cabin is 10X12 with lap siding and a metal roof. NO insulation. It has a 55 gallon drum stove (read hotter than hell) but you need to keep her cranking just to keep warm. No studs or anything in the cabin, any ideas as to a good insulator for the roof and walls? I was thinking blueboard but I am open to ideas. I will be putting a new roof on Monday so now's the time.