Air leaks around a volume damper frame inside a wall sleeve
Metal-to-metal damper frames can leak around the perimeter. Back it off, clean the faces, add the approved gasket/seal detail, re-tighten evenly, and retest.
Do not keep tightening metal-to-metal frames and expect a missing gasket to appear.
Check
Confirm the leak is around the damper-to-sleeve frame, not the blade or downstream joint.
Check whether gasket tape/sealant was omitted or broken.
Clean metal faces before sealing.
Install continuous approved gasket/seal detail with no gaps at corners.
Tighten evenly and retest.
Steps
Confirm the leak is around the damper-to-sleeve frame, not the blade or downstream joint.
Check whether gasket tape/sealant was omitted or broken.
Clean metal faces before sealing.
Install continuous approved gasket/seal detail with no gaps at corners.
Tighten evenly and retest.
Say this to your foreman
The volume damper frame at [location] is leaking around the sleeve. I checked the perimeter and it appears metal-to-metal. Do you want it backed off and gasketed/sealed per detail?