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Insulation Services in Wilmington, DE
Compare 28 insulation services contractors near you in Wilmington and surrounding area with an average rating of 4.7/5. Get free quotes, read reviews, and find the right pro for your project.
Last updated March 22, 2026
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Thermal Seal Experts
1G Services & Roofing Services
5.0Delaware Spray Foam
5.019+ years onlineIMC Insulation Mat Corporation
5.0~22 years onlineKoala Insulation of the Delaware Valley
5.07+ years onlinePatriot Insulation Contractor LLC
5.016½+ years onlinePhiladelphia Spray Foam Insulation
5.05½+ years onlineRLSC Chimney Cleaning And Atic Insulation Services In Delaware Ltd.
5.0AGL Spray Foam
4.913½+ years onlineAmira Contracting Inc
4.98½+ years onlineERCO Ceilings & Interiors
4.94½+ years onlineKoala Insulation of Chester County
4.97+ years onlineKoala Insulation of Newark
4.97+ years onlineTycos Roofing and Siding
4.910½+ years onlinePJ Fitzpatrick
4.827½+ years onlineCounty Insulation Co
4.622½+ years onlineSealright Injection Foam
4.6The Spray Foam Works Co
4.65½+ years onlineEnergy Services Group
4.4~25 years onlineEastern Industrial Services Inc
4.322½+ years onlineInsulation Guyz
4.32+ years onlineIMC Materials Corporation
4.2~22 years onlineInsulation4US
2.911½+ years onlineInsulation Services in Nearby DE Cities
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About Insulation Services in Wilmington
Insulation services cover attic, wall, floor, and crawl space insulation using materials like fiberglass batts, blown-in cellulose, spray foam, and rigid board. Proper insulation reduces heating and cooling costs and improves comfort year-round.
Typical costs: Attic insulation runs $1,500–$4,000 for a typical home. Spray foam for a crawl space or basement is $2,000–$6,000. Whole-home insulation upgrades can be $5,000–$15,000.
Common projects include:
- Attic insulation upgrade
- Spray foam crawl space or basement
- Wall cavity insulation
- Weatherization and air sealing
- Garage insulation
Simple insulation upgrades in existing walls and attics usually don't require permits. If the work involves modifying structure or electrical, permits may apply.
Frequently Asked Questions
- How much does insulation services cost in Wilmington?
- Blown-in attic insulation to bring an older home up to current R-value standards runs $1,500–$4,000. Spray foam insulation for a crawl space or rim joist is $2,000–$6,000. Many utility companies offer rebates for insulation upgrades — ask your installer about available incentives.
- How do I find a reliable insulation services contractor in Wilmington?
- A good insulation contractor starts with an energy audit or at least an R-value assessment of your current insulation. They should recommend the right material for each area (spray foam for air sealing, blown-in for attics, batts for accessible wall cavities).
- Do I need a permit for insulation services in Wilmington?
- Adding insulation to existing spaces (attic blow-in, wall injection) typically doesn't require a permit. If the project involves structural access, like opening walls, permits may be needed.
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NeedInstall helps connect customers with local installation professionals across Wilmington and surrounding communities. Featured contractors have claimed their profile and verified their business information. Listings marked as "Verified Pro" have been confirmed by the business owner.