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9
votes
5answers
11k views

Why don't people use rigid or spray foam insulation in attics?

I'm looking to upgrade the insulation in my attic bumping it from an R-6 to R-30 or better, and while looking into things I realized I've never seen anyone use rigid or spray foam insulation in an ...
4
votes
3answers
3k views

How do I insulate the ceiling in my crawlspace?

I'm desperately looking for some advice on how to properly insulate the crawl space. I live in eastern Massachusetts where it has recently been in the teens and 20s for low temps in winter. I have a ...
3
votes
1answer
470 views

Does 2“ of spray foam mean 2”, or are measurements like with finished lumber?

I just had (and paid for) 2" of spray foam on my crawl space walls. I checked the thickness today and it is rarely 2" thick, usually just under 1.5", and sometimes just 1" thick. Is this normal? Or ...
3
votes
1answer
612 views

How do I raise my garage ceiling after spray foaming?

I'm starting to add central vac to my house, which mostly involves pipes in the garage. I cut a hole in the garage ceiling (drywalled) to check things out, and found there's an 18" up to the bottom of ...
2
votes
2answers
139 views

spray foam personal protection

I have a closet in the master bedroom of my home that is on an exterior wall. Unfortunately there's no insulation on the back wall of the closet and so a lot of heat escapes. We keep the closet door ...