The "perfect wall" is climate dependant. Polyiso insulation drops in R value in freezing temperatures. Replace that 3 inches with 4-5 inches of graphite infused styrofoam and it's way fucking better, maybe even cheaper.
The "perfect wall" is climate dependant. Polyiso insulation drops in R value in freezing temperatures. Replace that 3 inches with 4-5 inches of graphite infused styrofoam and it's way fucking better, maybe even cheaper.
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