Raft slab edge insulation detail
Hi – I’m building a home in Central Vermont (Zone 6) this summer and had a question regarding slab edge detailing.
I’d like to get R30 under and on the edges of a raft slab to meet some energy goals in the state. That would mean roughly 7″ of eps outboard of the slab edge. I’m framing a conventional 2×6 wall and will overhang my bottom plate a 1.5″ from the edge of the foundation + 3″ of exterior roxul. How could I cleanly make that transition over the remaining 2.5″ of foam? Should I go to 4.5″ of foam on the edges and and have it plane out nicely or does anybody have a clever work around? Any and all suggestion are much appreciated. Thank You.
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