5 Best Spray Foam Insulation Services in Seattle (2026)

Arrow Insulation is a Seattle insulation contractor handling attic, crawl space and wall insulation, along with related restoration work on manufactured and older homes. Reviewers describe multi-day projects covering total attic and crawl-space remediation, including removal of old debris, sealing entry points and rebuilding damaged sections. The company also processes utility rebate paperwork for customers.

Insulation Co is a Seattle contractor focused on crawl space and attic cleanout, insulation removal and reinstallation, plus related mold removal, rodent exclusion and drainage work like sump pumps and French drains. Reviewers consistently name the owner directly, describing a hands-on approach from the initial quote through the final walkthrough.

Cascade RetroFoam, formerly Washington RetroFoam, specializes in injecting foam insulation into the existing walls of older homes without removing drywall or siding, aiming to warm up drafty rooms and cut noise transfer between spaces. It serves the Seattle and Portland areas and typically completes a home's retrofit in a single day.

USA Insulation of North Puget Sound is the local branch of a national insulation company, based in Kirkland and covering spray foam, fiberglass and cellulose insulation across residential and commercial properties. Reviewers describe both installation jobs and standalone diagnostic visits to track down specific insulation problems like blocked vents.

AT FOAM is a spray foam insulation contractor serving Seattle and the wider Pacific Northwest, working on attics, unfinished spaces and custom structures like standalone studios and silos. The company distinguishes between open-cell and closed-cell foam applications depending on the space and climate needs, and reviewers describe multi-crew jobs completed ahead of schedule.