Mike Lamb 37 Report post Posted August 21 Would fiberglass stuffed around a duct penetration be an acceptable fire stop? Quote Share this post Link to post Share on other sites
Chad Fabry 34 Report post Posted August 21 No 1 Quote Share this post Link to post Share on other sites
Jim Katen 74 Report post Posted August 22 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 Share this post Link to post Share on other sites
Bill Kibbel 51 Report post Posted August 22 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 Share this post Link to post Share on other sites
inspector57 5 Report post Posted August 22 Depends on the building. Residential single family, yes. High rise multifamily, no. Quote Share this post Link to post Share on other sites
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