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Insulation, Liner, Wrap & Vapor Barrier

Liner Damage Repair Before Closeout

Torn or dirty liner can become an airflow, cleanliness, and inspection problem if closed up without repair.

Yellow / Check First1stBatch 6

What This Helps With

Torn or dirty liner can become an airflow, cleanliness, and inspection problem if closed up without repair.

Apprentice words: torn duct liner, liner repair, damaged insulation inside duct, loose liner

Common problem: Liner gets snagged by tools, screws, handling, or field cuts and no one repairs it before closing the run.

Check First

Tears, loose corners, missing pins, dirty/oily sections, and whether repair method is allowed by spec.

What Not To Do

Do not hide damaged liner. Do not patch with random tape unless the manufacturer/spec allows it.

What can go wrong: Liner gets snagged by tools, screws, handling, or field cuts and no one repairs it before closing the run.

Better Foreman Question

This liner is torn at [location]. What repair method does the spec/manufacturer allow?

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Verify With

Source to verify: Project spec, liner manufacturer instructions

Safe wording: Repair method must match liner type and project cleanliness requirements.

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