Content Gap Batch 10Duct Liner vs External Wrap: Confirm the Intended Insulation System
Insulation, Liner, Vapor Barrier & CondensationVERIFYField judgment
Core Answer
Confirm whether the duct is designed for internal liner, external insulation, both, or neither before fabrication or installation.
Open in Field RescueOpen Category
What to Check First
- Read the duct schedule and insulation specification
- Check acoustic, thermal, and condensation requirements
- Confirm exposed or concealed condition
- Verify liner thickness, wrap thickness, and facing
- Coordinate access doors, dampers, sensors, and supports
Ask Foreman
Is this run supposed to be internally lined, externally wrapped, or both, and where does the change occur?
Text to Foreman
Do Not Do This
Do not swap liner for wrap because one is easier, double-insulate without approval, or cover labels and service access.
Why This Matters
Liner and wrap solve different acoustic, thermal, and condensation problems and change the finished duct dimensions.
Verify against: mechanical duct schedule, insulation specification, acoustic requirements, approved shop drawings.
TinnerFlow™