Basement wiring with rigid foam insulation
I have a concrete full height basement in climate zone 6 built in the 1980’s. The basement is partially within the thermal envelope and I am in the process of insulating and air sealing the rim joists with the cut and cobble method.
After the rim joists I’ll be insulating the concrete walls, and am planning to use 2” polyiso foam, but am open to alternatives.
my question is this: what is the best way to attach dry wall and allow for outlets without framing a full 2×4 wall inside of the foam? There are a few places where the extra wall thickness would be annoying, so I’m hoping to keep the assembly as thin as possible. Is metal conduit running along the wall too weird for a residential basement? Any other solutions with better aesthetics?
I’m not planning to finish the basement (only drywalling for the sake of the thermal barrier), but don’t want to make things difficult for a future owner who might want to.
Thanks for your time!
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