Bottom edge of rigid foam on basement wall
I’m going about installing 2″ or 3″ of XPS 4×8 sheets on my basement walls and then installing 1×3 firring strips across the top. I’m wondering if I should bring the foam all the way to the basement floor, or leave a gap and fill the gap with expanding foam. My vote is the first method, but I think maybe the gap with expanding foam may be a tighter seal.
Also, bit different question, in zone 5 with a walkout basement (1 side 50% exposed 1 side 100% exposed) should I consider installing foam and plywood on my floor? Contractor never installed it before the pour because he had never seen it done in our area. I’m wondering if it’d be worth the investment and extra hassle.
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