Vent Channels for I-Joist Rafters
I am building a 6/12 pitch cathedral ceiling with 14″ I-joists. I plan to create a vent channel between the top flanges of the I-joists and filling the rest of the joist cavity with open cell spray foam.
In the past, I’ve created these vent channels by nailing 7/16″ OSB to the underside of the upper joist flanges, but this approach is much more costly now with the price of OSB at $27/sheet. I’m wondering – is there any reason I couldn’t use housewrap to create the vent channel, pulling it taught and stapling it well to the underside of the upper I-joist flanges?
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