A TDC/Ductmate gasket screams under fan pressure

A screaming TDC/Ductmate joint usually means air is escaping through a bad gasket, corner, bow, or missing clip/cleat. Find the leak and correct the joint instead of only smearing the outside.

Rectangular Duct & Fittings 1st Year GREEN

Watch out

Do not assume the loudest spot is the only bad part of the flange.

Check

Find the exact leaking corner or span without putting hands near unsafe moving air/equipment.
Check gasket continuity, corner bolts, flange clips/cleats, flange bowing, and duct support.
Look for dirt, folded gasket, missing gasket, or a flange pulled out of square.
Use the approved repair/seal method for that connector and pressure class.
Recheck after startup/test before insulation or ceiling cover.

Steps

Find the exact leaking corner or span without putting hands near unsafe moving air/equipment.
Check gasket continuity, corner bolts, flange clips/cleats, flange bowing, and duct support.
Look for dirt, folded gasket, missing gasket, or a flange pulled out of square.
Use the approved repair/seal method for that connector and pressure class.
Recheck after startup/test before insulation or ceiling cover.

Say this to your foreman

The TDC/Ductmate joint at [location] is screaming under fan pressure. I checked gasket, corners, clips, bolts, and flange bowing. Do you want me to reopen/re-seat the joint or repair/seal per approved method?