Insulating a wall with loose and blown-in foam
We are in Zone 6 . Most builders here recommend the code which is 2×6 walls with R20 loose insulation plus optionally 1″ of rigid foam outside of the plywood . One builder recommended R-20 loose insulation and 1″ of blown in foam between the loose insulation and the vapor barrier. He said it creates a better seal.
I haven’t seen this method, is it a sensible alternative to what the other builders are recommending?
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