Waterproofing stem walls in a slab on grade foundation
I am detailing out the foundation plans for a 1 level modern ranch with a slab with concrete wall foundation (similar to the attached pic.)
While I have plans to seal the foundation to sheathing (probably with Prosoco’s R-Guard Joint & Seam Filler) as well as doing other measures including 3-4″ of EPS foam under the slab (2″ on perimeter), a 10mil Vapor Barrier, the use of EPDM Gaskets as sill seals, I’ve not found any information one way or another on my need to waterproof the exterior of the stem walls. I will be incorporating rain screens, french drains and be sure to divert all gutter outflow away from the building.
I’m on a low slope lot with no water issues and am in climate zone 4. (Central Kentucky). The slab will include radiant..
To me it wouldn’t make sense to add a waterproofing measure to these stem walls, but am I missing something?
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