Insulating at the sill when joists are embedded in concrete?
I have a 70-year-old house in Ontario. The floor joists are fully embedded in a poured concrete foundation (the top of the joist is flush with the top of the foundation).
I’ve read several comments on GBA suggesting that I avoid putting rigid insulation between the joists because it’ll make the joist ends colder and more prone to rot (if moisture is somehow getting in there). However I’ve read contrary statements in NRCan’s “Keeping the Heat In”, section 6.2.6. The diagrams there show that it’s okay to put in 1″ or less of rigid foam, and caulk the gaps.
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