Can Spray Foam Around Fireplace Chimney
Hi Everyone –
We are renovating a house in NJ with a masonry wood-burning fireplace that we plan to use occasionally.
This week, we did some blower-door directed air sealing. In order to seal the gap between the chimney and the framing, where the chimney penetrates the roof, the contractor used generous amounts of orange Great Stuff Gap + Crack foam.
After the work was done, I checked the manufacturer data for the foam and learned that it’s combustible, and therefore should not have been used. It appears this is also a code violation.
Is this a serious safety issue? Should we try to scrape out all of the applied foam and replace it with a metal or fiber cement barrier, sealed with intumescent caulk? Is that a waste of time?
Thank you in advance,
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