Raycore - is it the product for me?
I was pretty much on board with buying Raycore for the 4500 s.f. home I am building in downstate NY, which is steel framed, so I actually don't need any structural value out of the exterior walls other than for supporting the windows and doors (and supporting the walls themselves). I am also going with a wire lathe and stucco on the exterior - Raycore told me I could direct apply the wire lathe and did not have to use any sheathing if I did not need the shear strength, but I am hesitant to do so.
After reading all of these comments, I don't think Raycore is a smart idea as the R-value I would attain for a 5.5" wall doesn't seem worth it to me for the cost of $6/s.f.
I was thinking of just staggering two rows of 2x4 timber stick-built walls back-to-back, with 2' wide, 3 1/2" thick rigid polyurethane foam in between, so that I eliminate the thermal bridging, similar to what Raycore offers (with obviously not as good a seal at the 2x4's, but I would look to spray along the edges by hand). Would this achieve close to R-35?
Would I bond them together with adhesive? Vapor barrier/foil between? Or perhaps go 3" and 3" with 1" furring between to give an air pocket between (would give me a chase for wiring too that way)?
Posted Jul 14, 2014 5:10 PM ET
Edited Jul 15, 2014 12:39 PM ET
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