2 posts / 0 new
Last post
attic insulation thickness

Is there a common rule on the thickness of batt fiberglass insulation for attics? I understand that the R value should be around 40 for our house. Live in Northwest Michigan.

Re: attic insulation thickness

R value should be printed on the bats, i don't think they make an r 40 batt you would probably have to use 2 layers, a 6 inch bat is around R 19.

TV Listings

Find TV listings for This Old House and Ask This Old House in your area.