Content Gap Batch 10

Insulation Thickness and R-Value: Use the Schedule, Not Memory

Insulation, Liner, Vapor Barrier & CondensationVERIFYField judgment

Core Answer

Read the insulation schedule for the duct service, location, temperature, and exposure, then confirm the installed product provides the specified thickness and thermal value.

Open in Field Rescue Open Category

What to Check First

Identify duct service and location
Read the current insulation schedule and notes
Match product type, thickness, density, and facing
Check compression at supports and tight clearances
Verify transitions between indoor, outdoor, and unconditioned areas

Ask Foreman

What insulation type and thickness does the schedule require for this duct service and location?

Text to Foreman

Do Not Do This

Do not copy the thickness from a nearby system, compress insulation to fit, or assume equal thickness means equal R-value.

Why This Matters

Wrong insulation can cause condensation, energy loss, failed inspection, and expensive replacement after ceilings close.

Verify against: project insulation schedule, energy requirements, approved insulation submittal.