Capital Insulation, Llc
Verified Pro
21+ years online5.0(23)
Insulation Services in Washington, DC
Compare 26 insulation services contractors near you in Washington and surrounding area with an average rating of 4.8/5. Get free quotes, read reviews, and find the right pro for your project.
Last updated May 22, 2026
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Insulation Services in Washington, DC
Washington DC insulation upgrades pay back fast given Pepco/Washington Gas rates and DC's heat-cold swings. Most pre-1990 DC homes have R-19 to R-30 attics — well below the modern R-49+ target. Air sealing before insulation matters in older Capitol Hill brownstones. Pepco rebates available. NeedInstall connects you with DC insulation contractors who handle Pepco paperwork, blower-door testing, and proper detailing.
DC attic top-up to R-49+: $2,500-$6,000 (premium market). Wall dense-pack: $5,000-$12,000 retrofit. Basement spray-foam: $4-$7 per board foot. DC requires a Home Improvement Contractor license. Pepco rebates ($300-$2,000+). Blower-door test ($300-$500) often required.
Frequently Asked Questions
- Worth on natural gas?
- Yes — DC heating loads. Payback 4-7 years.
- Pepco rebate?
- $300-$2,000+ for qualifying upgrades.
- Spray-foam vs cellulose?
- Cellulose for attics. Spray-foam for basements.
About NeedInstall
NeedInstall helps connect customers with local installation professionals across Washington 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.