Guest Tom10 Posted October 19, 2022 Report Share Posted October 19, 2022 Hi all, A little confused with regards to whether ventilation extract ducts (circa 110mm diameter) through an external masonry cavity wall need to be fire stopped internally. I don't believe there is a requirement under Approved Document B for a cavity barrier (within cavity) around the duct, but unsure if it needs to be sealed internally with an intumescent collar or would a non-fire rated sealant be acceptable to restrict air movement only. Would appreciate your thoughts. Thanks Tom Quote Link to comment Share on other sites More sharing options...
Tom Sutton Posted October 25, 2022 Report Share Posted October 25, 2022 What material is the duct constructed of, and why do you think it may need fire sealing. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You are posting as a guest. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.