Mike Lamb 56 Posted August 21, 2019 Report Share Posted August 21, 2019 Would fiberglass stuffed around a duct penetration be an acceptable fire stop? Quote Link to post Share on other sites
Chad Fabry 54 Posted August 21, 2019 Report Share Posted August 21, 2019 No 1 Quote Link to post Share on other sites
Jim Katen 124 Posted August 22, 2019 Report Share Posted August 22, 2019 In my area, it's been accepted. In fact, I had a city inspector suggest it to me at an inspection of my very own personal house. 1 Quote Link to post Share on other sites
Bill Kibbel 74 Posted August 22, 2019 Report Share Posted August 22, 2019 Fiberglass is an approved material for fireblocking around ducts and other penetrations - as long as it's installed so that it securely remains in place. The latter is left open to interpretation. 1 Quote Link to post Share on other sites
inspector57 8 Posted August 22, 2019 Report Share Posted August 22, 2019 Depends on the building. Residential single family, yes. High rise multifamily, no. Quote Link to post Share on other sites
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