Top-Rated Insulation Installers in Seattle, WA

5 local companies ranked by 502 Google reviews. Free to compare, no sign-up.

Ratings and review counts from Google Maps, collected October 2026 · Page updated October 9, 2026

5Companies
502Google reviews
5.0★Average rating
Oct 2026Data collected
Ranked by Google reviewsNever paid forFree to compare

Short answer: The top-rated insulation installers in Seattle are Insulation Co (5.0★, 288 reviews), Attic Star (5.0★, 115 reviews), Precision Spray Foam Insulation Seattle (5.0★, 42 reviews).

Insulation installers in Seattle, ranked 5 listed

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  1. 1
    Insulation CoTop pickMost reviews
    5.0 (288 Google reviews)
    1420 E Pine St, Seattle, WA 98122
    Call (206) 497-7358WebsiteGoogle reviewsDirections
  2. 2
    Attic StarTop pick
    5.0 (115 Google reviews)
    10223 59th Ave S, Seattle, WA 98178
    Call (800) 373-0525WebsiteGoogle reviewsDirections
  3. 3
    Precision Spray Foam Insulation SeattleTop pick
    5.0 (42 Google reviews)
    1604 NE 50th St b6, Seattle, WA 98105
    Call (206) 339-5565WebsiteGoogle reviewsDirections
  4. 4
    Signature Insulation Inc
    5.0 (32 Google reviews)
    7101 62nd Ave NE, Seattle, WA 98115
    WebsiteGoogle reviewsDirections
  5. 5
    Cascadia Spray Foam Insulation of Seattle
    4.8 (25 Google reviews)
    4659 S Willow St, Seattle, WA 98118
    Call (425) 386-3500WebsiteGoogle reviewsDirectionsEmail [email protected]

Together these 5 companies average 5.0★ across 502 reviews. Insulation Co has the most reviews (288).

Ranked by Google rating weighted by review count, collected October 2026. Rankings are never paid for. How we rank and how we make money.

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What a insulation costs in Seattle

Typical installed priceVaries by area

Price depends on which areas you insulate (attic, walls, basement) and how much air sealing is needed. Ask each company for a price per area and the R-value you end up with, so quotes are easy to compare.

Rebates open in SeattleNone confirmed right now

Financing or future programs may still help. Check the rebate page before you sign.

Rebates: our verified program data, checked monthly. Always confirm the exact amount for your home.

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Before you hire a insulation installer

  1. Ask whether they will air-seal before insulating, and what they will seal (attic hatch, pot lights, pipes, top plates).
  2. Ask for the R-value before and after for each area, and the material and depth they will install.
  3. Ask whether your rebate needs an energy assessment before and after the work, and who books it.
  4. Ask how they handle ventilation and any old insulation that could contain vermiculite (asbestos risk).

Questions about insulation installers in Seattle

Who is the best insulation installer in Seattle?

Based on Google reviews, the top-rated insulation installers in Seattle are Insulation Co (5.0★, 288 reviews), Attic Star (5.0★, 115 reviews), Precision Spray Foam Insulation Seattle (5.0★, 42 reviews). We rank by a review-weighted score, so companies with many strong reviews rank above those with only a few.

How are the insulation installers in Seattle ranked?

We list 5 insulation companies in Seattle, ranked by Google rating weighted by review count. Together they have 502 Google reviews and average 5.0 stars, collected October 2026. Insulation Co has the most reviews (288). No company pays to be listed or ranked.

How much does insulation cost in Seattle?

Insulation prices depend on which areas you insulate (attic, walls, basement) and how much air sealing is needed. Ask each company for a price per area and the R-value you end up with, so quotes are easy to compare.

Are there rebates for insulation in Seattle?

We have no confirmed open insulation rebate for Seattle right now. Financing or future programs may still help, so check the rebate page before you sign.

What should I ask an insulation installer before I hire?

Ask whether they will air-seal before insulating, and what they will seal (attic hatch, pot lights, pipes, top plates). Ask for the R-value before and after for each area, and the material and depth they will install. Ask whether your rebate needs an energy assessment before and after the work, and who books it.

Before you call anyone, check what insulation rebates you can get in Seattle. Many programs require approval or a registered contractor before work starts.

Planning more upgrades? See the top-rated heat pump installers, solar installers, home battery installers in Seattle.

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