SERVICE GUIDE
Insulation.
Know what comes out—and what goes back.
Understand what’s included.
Compare removal, disposal, preparation, and replacement as separate parts of the scope. Ask how the proposed insulation approach fits the crawl space design and local requirements.
BRING THESE QUESTIONS
- What existing material will be removed and disposed of?
- What moisture issues should be addressed first?
- Where will new insulation be installed, and what product is specified?
What needs to happen before new insulation goes in?
Ask for a work sequence that leaves time to inspect exposed areas after removal. Covering the same unresolved problem with new material can make the next inspection harder.
- Inspect the exposed framing: document leak locations, damp areas and damaged wood. Ask who evaluates suspected structural damage and what conditions must be resolved before replacement begins. Building America advises correcting moisture sources and inadequate framing before retrofit work proceeds.
- Confirm the insulation boundary: show on the quote whether insulation belongs at the floor or foundation walls. In a floor-insulated assembly, DOE guidance calls for air sealing penetrations and supporting batts in continuous contact with the subfloor, without gaps or compression. See our floor-joist versus foundation-wall insulation guide.
- Coordinate HVAC work: identify leaking or damaged ducts and wet duct insulation before concealing nearby areas. Treat the floor-insulation scope and duct repairs as separate line items. Our duct-condensation guide explains why moisture at ducts needs its own diagnosis.
- Check the finished details: request photographs of support and coverage, product labels and installed R-values. Confirm any required pest-inspection gaps, fire protection and equipment access with the appropriate professionals.
If the work changes a vented crawl space to a closed design, use the permit-planning checklist before agreeing to the installation sequence.
Sources reviewed October 4, 2026: Building America retrofit assessment; DOE floor-insulation guidance; unvented crawl-space requirements.
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