ASL Out of the Attic Issue 2,I want to insulating 1929 attic ceiling so make attic useable space. The rafters are only 3.5 inch deep. Would 2-in R 10 rigid boards between rafters with another horizontal layer on,There's a house in my attic (part 2) : r/interestingasfuck,There's a house in my attic (part 2) : r/interestingasfuck,Can I turn my attic into a second story? : r/hvacadvice