Follow the project seal requirement. If screw penetrations need sealing, clean the area and seal with the approved material after the joint is mechanically correct.
Verify screw type/location if the detail requires it
Check for distortion, stripped holes, and seal path issues
Ask foreman
In Rectangular Duct Assembly: S-and-Drive, I’m looking at: What do I do about screw penetrations near an S-and-drive joint? What should I verify before I cut, drill, seal, cover, move, or install?
Do not
Do not over-screw, strip, distort, or use screws to make up for a bad fit.
