Insulation for dormer with thinner studs
I am in the process of building a small cabin in Climate zone 7-8. All the walls are 2×6 and I am planning on using Roxul to fill the stud bays. Exterior has no foam just 1/2 plywood and Tyvek. I will be installing a rainscreen and using some sort of cement board siding.
What I’m wondering about is my dormers, there are two in the loft. The contractor who finished the roof for me including the dormers, went down to 2×4 studs for the walls of the dormers. I’m wondering is it okay to drop down to R-15 Roxul for these or should I try to maintain the R-23 the rest of the walls will have by using the cut and cobble with EPS and Polyiso layers inside the studs? Might I just be over thinking it? I certainly wouldn’t like the dormers to be any colder than the remainder of the building.
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