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Air sealing rim joist spaces, does code require a fire resistant barrier over it?
I'm air sealing rim joist spaces in my basement with 2" thick XPS pink foam in each cavity-does code require me to cover it with fire resist barrier (like a piece of drywall) over it?
None of the literature I've seen describing this ever says to cover it with a fire barrier like drywall, including the literature I've read and downloaded here on FHB or in a book a bought from Taunton Press on energy saving projects.
I know it's required when your insulating an entire basement wall with it.