cabin spray insulating
hi. northern climate, occasional winter use with wood stove and some other radiant heat sources.
want to spray foam all areas with closed cell dyi product (ie: spray and foam or froth pack or like product ). off grid unaccessible for professional.
goal of spray foam is 1) air seal 2) r factor. cant achieve desired R factor with this foam and dont want pink or roxull for flash and batt if i dont have to. question is, can i fill 2-3 “ of spray foam in 2×6 (51/2) walls and 2×10 raftersmon small slope cathederal ceiling and then attach ridgid foam board to the 2×6 and 2x10s?
hoping to achieve a small increase in Rvalue but dont know what to make of cavity that will exist between spray foam and ridgid insulation on the joists and rafters?
any suggestions? thanks
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