Whether or Not to Use Exterior Rigid Insulation
I’m just about done framing my home and am trying to come to a decision on if I should use 1” of exterior rigid foam. Windows are going to be here in a few weeks and I’ll need to get the window bucks framed for outie windows.
climate zone 6, 7/16” zip, with 2×6 construction, raised heel trusses (for r-60 blown in fiberglass). Stud cavity insulation will be fiberglass batt or rock wool with a vapor retarder
I did a Beopt model a little while ago and I saw only a $5 a month savings if I installed 1” of rigid continuous insulation. From a financial point of view it doesn’t make sense. Does it add any comfort to the home?
I found 4×8 sheets of DuPont branded XPS for $16 a sheet so cost will not be a huge factor, labor is mine.
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