Before Insulation

Use before duct wrap, liner repair, vapor barrier, or insulation covers work.

Duct is about to be wrapped, lined, closed up, or hidden above ceiling/walls.

Ask when insulation conflicts with access, fire/smoke dampers, grease duct, sensors, or when the vapor barrier detail is unclear.

Do not bury access doors, damper labels, actuators, sensors, or cleanouts.
Do not wrap over wet duct or damaged vapor barrier without direction.
Do not crush flex/duct with straps or insulation.
Do not assume insulation fixes condensation if the real issue is routing/sealing/vapor barrier.

Check what needs to remain visible, accessible, sealed, and dry before insulation covers it.
Confirm duct is sealed/accepted enough to cover based on project direction.
Find dampers, access doors, labels, actuators, sensors, cleanouts, and service points.
Check hanger/rod/strap condition before the duct is hidden.
Confirm vapor barrier continuity and how seams/tears will be sealed.
Take photos of access points and special conditions before cover-up.
Ask before wrapping over anything that future inspection, service, TAB, or cleaning needs.