Static field route #52

What do I do when forgetting insulation thickness when measuring clearance?

Measuring, Field Verification & Layout MarksFoundation layout starter — field verify before cutting/loading

Include insulation thickness when measuring clearance. Finished duct is bigger than bare duct.

Open in Field Rescue Open category

Field checklist

Find insulation/liner schedule.
Add wrap/jacket/liner thickness to clearance thinking.
Check around beams, walls, ceiling grid, hangers, and access panels.
Verify pinch points.
Ask if clearance only works without insulation.

Ask foreman

Does this measurement include insulation thickness and finished clearance?

Do not

Do not install bare duct in a space that will fail after insulation.

Why it matters

Tight duct that fits bare can become a crushed wrap or access problem later.

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