Static field route #829

What do I do when insulation compressed under strap?

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

Insulation compressed under a strap loses thickness and creates a cold/condensation spot. Support the duct without crushing the wrap.

Open in Field Rescue Open category

Field checklist

Check all strap/contact points along the run.
Look for flattened wrap or torn facing.
Verify whether a saddle, shield, or trapeze detail is required.
Rework before ceiling close if compression is obvious.

Ask foreman

This strap is compressing the insulation. Do you want a saddle/shield or another support detail?

Do not

Do not cinch straps into wrapped duct.

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.

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