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Crawl space insulation quotes
Cold floors, insulation hanging down, or batts that got wet? Send one request and independent local crawl space companies contact you with quotes.
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- Cited 2026 pricesEvery figure links its source
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How this works: Chattanooga Crawl Space Quotes is a free referral service, not a crawl space contractor. We pass your request to independent local crawl space pros, who may pay us for the referral. They quote, schedule and do the work; check their insurance before you hire. More about us.
Walls or floor?
It depends on whether the crawl space is vented or sealed. In a vented crawl space, insulation usually goes between the floor joists, under the living space. In a sealed (encapsulated) crawl space, it usually goes on the foundation walls, so the crawl space becomes part of the house. Ask each company which approach its quote assumes, and why.
What does it cost?
HomeGuide's 2026 prices for a 1,000 sq ft crawl space with 3-foot walls:
| Type | Where | HomeGuide 2026 |
|---|---|---|
| Rigid foam board | Walls | $500 to $1,600 |
| Closed-cell spray foam | Walls | $850 to $2,100 |
| Fiberglass batts | Under the floor | $900 to $1,400 |
| Blown-in | Under the floor | $1,000 to $2,800 |
| Rigid foam board | Under the floor | $1,200 to $3,700 |
| Removing old insulation | Anywhere | +$1 to $2 per sq ft |
Angi's 2026 range for crawl space insulation is $500 to $4,000.
Fix wet first
The EPA's rule for any wet material is to dry it within 24 to 48 hours or expect mold. If the old batts are wet, sagging or moldy, ask for removal in the quote and deal with the water (drainage) or humidity (dehumidifier) at the same time.
Termites and permits
- UT Extension warns that termites can tunnel through foam board insulation below grade, and that liquid termiticides are hard to apply where foam is in the way. Ask your pest company whether wall foam affects its inspections or contract.
- Signal Mountain's permit list includes "insulating" among alterations that need a permit. Check with your codes office (permits page).
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Sources
- HomeGuide, Crawl Space Encapsulation Cost (Jan 14, 2026)
- Angi, How Much Does Crawl Space Repair Cost? (updated Oct 8, 2026)
- U.S. EPA, A Brief Guide to Mold, Moisture and Your Home
- UT Extension PB1344, Subterranean Termite Control (PDF)
- Town of Signal Mountain, Permits for Residential Construction (rev. Aug 2026, PDF)
Prices are national ranges published by the sources above, not quotes. Your price depends on the system, access and timing; local companies quote after seeing the job.