Large Duct Gap: Repair the Joint Before Adding Mesh and Sealant
Correct the mechanical fit first; use reinforcing mesh and sealant only within the approved product limits and project detail.
Stop if
- This joint has a gap of about [measurement]. Do you want the metal refit first, and is reinforced mesh approved for the remaining gap?
Watch out
- Do not bridge a badly fitted or unsupported joint with a thick pile of mastic and call it repaired.
Check
- Measure the gap and identify why the joint is open
- Check alignment, flange, seam, or fitting fit before sealing
- Correct loose or distorted metal where practical
- Verify whether mesh reinforcement is approved for the remaining gap
- Apply the specified system over a clean dry surface and allow cure time
Steps
- Measure the gap and identify why the joint is open
- Check alignment, flange, seam, or fitting fit before sealing
- Correct loose or distorted metal where practical
- Verify whether mesh reinforcement is approved for the remaining gap
- Apply the specified system over a clean dry surface and allow cure time
Say this to your foreman
This joint has a gap of about [measurement]. Do you want the metal refit first, and is reinforced mesh approved for the remaining gap?
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