Wall Assembly with Zip System Sheathing, Exterior Insulation, and Rainscreen
I am working on a new residential build for my personal home just north of Boston. I am interested in wall R value around +/- R-30, without breaking the bank. A few questions as a homeowner trying to drive a high performance build:
I was thinking 2×6 wall, zip system, exterior insulation, 1″ furring strips, and fiber cement siding for the wall assembly.
The 3 builders I spoke with do not have experience with exterior insulation and tend to tell me they “fill wall cavities spray foam” these days for high performance (helps them meet MA blower door sealing code).
Any recommendations for the combination of cavity insulation and exterior insulation for this assembly/climate zone (targeting R-30ish)? XPS vs EPS vs RW on the exterior?
Any recommendations to find a clean detail showing a similar assembly? I want to use this to show builders and gauge their comfort level. I am sure I have come across a few, but find myself drowning in BSC and GBA articles.
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