Confirm whether this is grease duct, kitchen exhaust, lab exhaust, industrial exhaust, or normal exhaust.
Check the approved drawings/spec/submittal.
Look for cleanout/access, clearance, enclosure/wrap, weld/seal, slope/drainage, and inspection requirements.
Verify the approved seal/weld/gasket method from the spec/submittal.
Ask foreman
In Grease Duct, Kitchen Exhaust & Industrial Exhaust, I’m looking at: What do I do when using non-approved sealant/tape on grease duct? What should I verify before I cut, drill, seal, cover, move, or install?
Do not
Do not assume normal galvanized duct rules apply. Do not patch grease/special exhaust with normal duct tape or generic sealant.
