Rim joist air-sealing options
We are using 2" of exterior polyiso foam with air-barrier established at the Zip sheathing. Our first choice in regards to the basement rim joist was to use closed-cell spray foam. Now I understand that we should avoid this "foam sandwich" but open-cell is an option due to its vapor permeability properties. Then I read more about foam and am a bit afraid of spray foam in general.
Since our exterior air barrier is the Zip sheathing, should I still be concerned about getting the air-sealing details perfect in this area? Any non-foam option seams like a ton of work for likely inferior results. Any thoughts or ideas appreciated.
Posted May 4, 2013 11:34 PM ET
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