What to do when the ends of the floor joists are embedded in concrete?
As an energy adviser in Manitoba, I see a lot of basements with cast-in-place joists. If the header space is filled with concrete up to the underside of the floor deck, the advice is easy: Cut R-5 XPS to fit, caulk or foam it in, and glue the vapour barrier.
While I’m at it – how about the rim joist space parallel to the joists?
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