Aaron Fude wrote:
Hi,

Just received a quote for roof insulation with closed cell foam between
the rafters. The quote is for 3" and I am being told that 3" is 90% as
good as 6". Do I believe them?

Thanks,
Aaron
Hi,
Where do you live? What is your area building code?
I have R60 attic, R24 ext. walls, R12 basement walls
insulation. Roof is ceramic coated steel tiles.
Hottest summer temp. 33 deg. C. Coldest winter -37 deg. C.
Wind chill could go down to -50 deg. C but not very often.
We have Chinook frequently.
Very dry climate year round.