Double stud wall, or better/fewer windows?
My wife and I are in the beginning stages of planning our next home build here in Maine and have been going back and forth with how we should spend our money. On one hand, I would love to build with a double stud wall and try and reach r40-r45, but on the other hand, we are seeing some higher than expected estimates for our other costs which may limit us in how we approach our wall assembly.
If we can’t afford the extra expense for the raw material, insulation, and labor to construct the double wall, would there be a “next best thing” that we could do? One thought was to just build with a traditional 2×6 wall, insulate with rock wool, or spray foam and add 1-2″ of rigid foam on the exterior (Zip r6?) and spend more money on better quality windows (triple-glaze), while minimizing windows on the north side and anywhere else we can.
I should mention we will be a slab on grade, 4″ of foam under the slab, two-story home, truss rafters, vinyl siding (metal in places for accent), open concept on the first floor, bedrooms on the second, with heat pumps for heating, and some type of HRV system.
Thanks in advance!
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