Top Rated Insulation Contractors Serving King County, WA
Last Updated May 15, 2026
356 Review Ratings and 1 Insulation Companies Evaluated.
These companies have passed our Preliminary 5-step rating process.
PNW Insulation
PNW Insulation provides insulation services for residential and commercial clients in the Greater Seattle area. The company has the training and equipment to work on all types of insulation projects, each of which is backed by superior craftsmanship and a company-wide dedication to quality.
Services
Insulation including spray foam insulation, thermal insulation, roof insulation, air sealing, foam board insulation, spray foam, retro fit, new construction & commercial, fire coating, insulation, air sealing, moisture control, water resistance and compressive strength.
Coverage Areas
The Seattle Area, including King County—key cities including Renton, Woodinville, Seahurst, Federal Way, Kent, Snoqualmie, Vashon, Auburn, Redmond and Sammamish.
- 216 23rd St SE
- Puyallup, WA 98372
These companies have earned our Pre-Qualified Rating. Learn more about our 5-step process.
Rating Step 1 = Stars
Meet or exceed a
ONE AllRatings star score of 4.5.
Indicates the final super-composite calculation of all reviews scores from all sources, optimized for accuracy and recency.
Read ONE AllRatings methodologyRating Step 2 = License
Verified active and in good standing (when required).
State license bureau data is accessed and analyzed.
Rating Step 3 = Background
Satisfactory status.
Internet searches were performed seeking disqualifying information on each company.
Rating Step 4 = Complaints
Satisfactory status.
Complaint bureau records have been searched seeking disqualifying information on each company.
Search Better Business BureauRating Step 5 = Specialist
Satisfactory status.
Our research specialist verifies all ratings steps have been passed and creates a final report and profile.
Meet our research specialist team
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