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It wouldn't even be cost to me. You have tons of crap running through your attic - electric, venting, whatever. Why would you want these things set in stone? What would you do if you needed to properly secure more electric after spraying. Does not make sense to me at all. I have been up in my attic 20-30 times over the past few years moving electric, ...

I used spray foam in my attic. Here's why: I wanted the A/C units in the attic to be in the thermal envelope of the house. Placing anything but sprayed open cell or closed cell foam on the underside of the roof deck was the only option for me. I could have used SIP panels if I was replacing the roof. To get R-value for my area (central FL) I would need ...