PVC-Coated Duct Is Cut Without a Coating-Repair Plan

Fast answer

Hold the field cut until the approved cutting method, edge treatment, compatible fasteners, sealant, and coating-repair procedure are confirmed.

What to check

1. Identify the coating system and service environment.
2. Check the manufacturer and project requirements for cut edges and holes.
3. Plan the cut to avoid unnecessary coating damage.
4. Verify cure and inspection requirements before concealment.

Do not

Do not treat PVC-coated duct like bare galvanized sheet or patch it with ordinary duct mastic.

Ask the foreman

“This PVC-coated section needs a field cut for the revised route. I checked the coating system, but the edge-repair procedure is not in the field package. Can we get the approved method before cutting?”

Why it matters

Exposed cut edges and incompatible repair materials can become early corrosion and chemical-attack points.