Open-cell spray foam vs. Roxul
Again I am asking insulation questions. I have a bid for a full foam compliment in my new construction home. They want to do 4″ of open cell in the exterior walls trouble is my walls are 2×6 and it just doesn’t make sense to leave that area open to me plus the foam performs best at 4″ thick so I understand the cost difference for payback on no the extra inch is tough to justify.
R-14 in the stud bays with the r-9 outside with polyiso just seems a little short on r value to me??? Seems like I can do better.
I’m in 47460 with 1.5 inches of polyiso foam on the outside. I am really struggling with this decision because I simply am running out of options.
Dense pack cellulose is not an option in my area, wet sprayed cellulose contractor gets horrible reviews and I don’t think I want the wet inside the wall cavity.
Some of you have recommended getting a power caulk gun, sealing the stud voids and installing the batts on my own….I think I would have a better r value in the end with the batt but honestly it’s turning out to be a budget thing. Cost wise am I getting more bang for my buck with the foam?
This is killing me with all the variables and I just want to make sure I am getting the most r value for my dollar. If that is batts then so be it. Please help
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