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Re: Spray Foam or Batts
said by LazMan:Even some open cell foam qualifies as a vapor barrier in Wisconsin. Maybe not all of them but the manufacturer will give you a copy of a certificate from the state if they have gone through the process.
Bonus with sprayfoam; if you go with close cell foam of sufficient dept (1.75-2" I believe) it also acts as a vapor barrier...
I have open cell and am very happy with it, although if I did it again I'd also get bids from some closed cell contractors. The foam draft sealing is far superior. A few Januaries ago, I took a look at some FLIR images of foam vs. blown-in and batts. The difference was night and day. Batts looked more like the no-insulation images.
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