5 Best Insulation Services in Seattle (2026)

Arrow Insulation is a Seattle insulation contractor working on attic and crawl space projects across the metro, from full attic insulation replacement to crawl space remediation and restoration. Crews handle both the removal of old, damaged material and the install of new insulation, plus related repairs like sump pumps and vapor barriers when a crawl space needs it. It has built the deepest review base of any insulation company on this page.

Insulation Co is a Seattle attic and crawl space specialist, listed on its own site as focused on attic cleaning, insulation removal and install, duct sealing, and crawl space mold and drainage work. Owner Jo Estrada is named repeatedly across its reviews for walking customers through the process and handling energy-rebate paperwork directly. It is the only business on this page holding a full 5.0 average.

Attic Doctor, based in Bellevue and serving the greater Seattle area, focuses on attic and crawl space mold remediation, rodent exclusion, and insulation replacement, including spray foam. Its own site describes mold inspections, moisture control, and mouse and rat proofing alongside standard insulation work, positioning it as a specialist for homes with an underlying pest or moisture problem rather than a straightforward insulation swap.

Super Attic Solutions, based in Kirkland, works on attic and crawl space insulation replacement, duct repair, and rodent proofing across the Seattle area. Reviewers describe multi-day projects where a detailed inspection is followed by a larger crew handling insulation removal, duct fixes, and a follow-up inspection weeks later. It also processes city and utility rebates on the customer's behalf.

USA Insulation of North Puget Sound is the local franchise of a national insulation brand, based in Kirkland and covering the North Puget Sound region including Seattle. It installs spray foam, fiberglass, and cellulose insulation for attics, walls, and crawl spaces, and reviewers frequently mention pipe insulation and smaller crawl space repairs alongside bigger jobs. It is part of a company with over 40 years of national experience.