Static field route #340

What do I do when outer jacket on flex disconnected from boot/collar?

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

The outer jacket is not the air seal. On flex, the inner liner connects to the collar; the jacket protects insulation after the air connection is secure.

Open in Field Rescue Open category

Field checklist

Check that the inner liner is pulled over the collar/boot.
Verify clamp/tie/seal method on the liner first.
Then bring insulation/jacket back over the connection.
Inspect for gaps or exposed insulation at the boot.

Ask foreman

Can you verify this flex connection before I finish the outer jacket? I want to make sure the inner liner is actually connected.

Do not

Do not zip-tie only the outer jacket and call it connected.

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 flex jacket