Static field route #329

What do I do when duct liner loose at connection?

Insulation, Liner, Vapor Barrier & Condensation.1 field-polished — insulation/rated-detail check

Loose liner at a connection can peel, flap, restrict airflow, or shed debris. Stop and get the liner edge fixed before the joint is hidden.

Open in Field Rescue Open category

Field checklist

Look at the liner edge at the connection or cut.
Check whether screws, raw edges, or airflow could lift the liner.
Verify the approved adhesive/pin/washer detail.
Do not cover the joint until the loose liner is secured.

Ask foreman

The liner is loose at this connection. Do you want it secured per the liner detail before we close this joint?

Do not

Do not rely on the duct connection to trap loose liner in place.

Why it matters

Insulation affects access, vapor barrier, condensation control, inspections, TAB/service access, and finished-work quality. Project specs and manufacturer details still control.

Search words: insulation liner vapor barrier liner