Capillary Break at Top of Foundation Wall
I’ve got a question in regards to location of where to put the capillary break. I read a lot about it being put on top of the footing. I can understand that, especially if planning to insulate on the exterior of foundation wall with conditioned basement space. What about insulating on the interior with closed cell spray foam that connects to the sub slab vapor barrier (Stego) and also a capillary break at top of walls? My general plan is along those lines with the top capillary break being a peal and stick membrane below the sill plates. It seems to make sense to me as all of the concrete will essentially be outside of the vapor control layer. The below grade wall heights range from 8′ to 5′ or so. Its essentially walk out style tucked into a hillside in VT. Other information that may be relevant is that for the two walls that go above slab height, we used full waterproofing spray with dimple mat and then will be back filling with crushed stone down to our perimeter drain.
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