Zip R-Sheathing (6.6) under floor framing, pier foundation
I’m building a 16×20 addition on piers as neither a basement nor a crawlspace are desired. I’d like to fill the 9.5″ floor framing bays with dense-packed cellulose and then apply Zip R-sheathing. I live in NH and don’t use air conditioning in the summer. Do you think the Zip R sheathing with 1″ of foam will be sufficient? I know it will help with thermal bridging, but should I be worried about condensation because it’s only 1″ and not 2 of foam? I appreciate your thoughts.
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