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Old 06-12-2012, 08:55 PM   #1
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stud wall cavity

I have a question about insulating a stud cavity. Typical 2 x 6 wall(or 2 x 4) cavity with studs 24" OC.

If I spray foam(using great stuff or similar) the vertical and horizontal seams where the stud meets the exterior sheeting then install a piece of blue foam by pressing it into the wet spray foam will I get a good seal? I think this would be less expensive than spray foam but haven't actually compared the costs yet. Is this a reasonable way to insulate? This would be for a stand alone building, maybe 24' x 16', used a studio or office space. Climate is zone 2, hot and humid.

Comments are appreciated, thanks.
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Old 06-13-2012, 09:34 PM   #2
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In your location that would work. I would caulk the plate/stud/sheathing joints and canned foam the f.b around the edges, cutting it 3/8 smaller than cavity. No gap to drywall, not tight to OSB.

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