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TRUSTED BY SEATTLE, WA HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon286
    Verified insulation services reviews

Find Insulation pros in Seattle

Avatar for Energy Pro Insulation, Inc.
Energy Pro Insulation, Inc.
4.7(
312
)

Serving Seattle, WA and surrounding areas

Approved

In business since 2014

Free estimates

Credit card accepted

"I had them come out to do a blower test to see where the leaks were for my house. They came out same week. The test was very cool. I got to feel where all the leaks were coming from in my house and see where we were missing insulation. I'd recommend having them come out and do this before having anyone do insulation. I plan on having them come out and fix my leaks"
31 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Insulation Northwest
Insulation Northwest
4.8(
107
)

Serving Seattle, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Warranties offered

"Insulation NW did an excellent job of removing old inadequate insulation from an attic and crawlspace and replacing it with new insulation and wrapping the ductwork. They had two crews, one for the attic and one for the crawlspace, working for many hours to complete the job. A vapor barrier was also installed in the crawlspace. We paid a very reasonable price after the large PSE Rebate was applied."
Additional Photos
Additional Photos
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25 neighbors recently requested a quote
Recommended by74%of homeowners
Avatar for Insulation Co., LLC - Removal & Clean Outs
Insulation Co., LLC - Removal & Clean Outs
4.9(
226
)

Serving Seattle, WA and surrounding areas

Approved

In business since 2009

Free estimates

Warranties offered

"Insulation Co (Jo Estrada) had insulation installers come to our century old house to remove old attic insulation, do a bit of mold remediation, insulate the bathroom fan exhaust, cover the two previously open gable spaces at either end of our roof, then blow in new cellulose insulation. All this took a day, and all was cleaned up like nothing happened. Polite, efficient, professional, and the price was competitive."
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+46

Response time5 hrs
Recommended by49%of homeowners
Avatar for PNW Insulation, LLC
PNW Insulation, LLC
4.7(
252
)

Serving Seattle, WA and surrounding areas

Approved

In business since 2015

Free estimates

Warranties offered

"PNW Insulation completed many insulation tasks on a house for me including wall insulation, crawl space and attic. They were very accommodating with scheduling the work at various times as each area was ready. I highly recommend them."
Before
All insulated
Final with Wmp
Getting ready to start
Inside office

+22

Response time1 day
Response rate92%
40 neighbors recently requested a quote
Avatar for Lake Atitlan Insulation, LLC
Lake Atitlan Insulation, LLC
5.0(
20
)

Serving Seattle, WA and surrounding areas

Approved

In business since 2021

Free estimates

Credit card accepted

"I hired the company Lake Atitlan Insulation Llc for the cleaning of my attic and new insulation. I was satisfied with their service. They are very punctual and respectful. I recommend them."
2 neighbors recently requested a quote
Recommended by5%of homeowners
Avatar for Madrona Insulation
Madrona Insulation
4.9(
68
)

Serving Seattle, WA and surrounding areas

Approved

In business since 2009

Free estimates

Warranties offered

"Fantastic. Of all the home improvement companies who have worked on many different jobs at this house in six years, Madrona takes the cake for providing the best quality work and amazing customer service. Madrona was the only company who gave us a thorough plan to not only put insulation in the attic but also to improve ventilation and ensure all roof penetrations were properly sealed. They added 1300 ft of R-44 blown fiberglass insulation over existing rock wool insulation that was fine but inadequate, to bring it to R-49. They fashioned a new wood access panel to the attic with a huge covered batt of fiberglass insulation fastened on the upper side and it feels like opening a secure air lock on the rare occasions where we've looked up into the attic. After they sealed all air penetrations in the attic they were very happy to show us what they did before adding the insulation. They installed insulation shield around the chimney, six roof jacks for proper venting, and vented kitchen and bath fans to dampered roof jacks, insulated with R-11 fiberglass batts. Four years later, the attic looks fantastic - there is no sign of any moisture and the blown in insulation looks as fluffy and lofty as when it was newly installed. I mistakenly thought one of the bath vents had been filled with insulation foam, causing the fan to not work very well, and Madrona sent someone out the next day even though the job was completed four years ago. Curt investigated and then politely and patiently explained that the side vent had been replaced with a better roof vent. And indeed, the fan was blowing air through the roof vent they installed and it is the old fan that is the problem, not Madrona's work. It would be wonderful if all companies stood behind their work this way."
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8 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for AT Foam
AT Foam
5.0(
5
)

Serving Seattle, WA and surrounding areas

Approved

In business since 2003

Free estimates

Warranties offered

"Unbelievable company such great work. John is one of the best business man I have ever dealt with he deserves 20 stars. And his crew does to if you ever need insulation go here. No place else. Best in the state 👍👍👍👍👍"
Roof deck closed cell spray foam
SPF roof deck
SPF ceiling and gable end wall
Flat ceiling 2lb closed cell
Flat ceiling roof deck

+21

Response time8 hrs
Response rate98%
2 neighbors recently requested a quote
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Insulation questions, answered by experts

Seattle’s wet climate makes moisture management essential for insulation longevity. Inspect attic and crawl space insulation annually for signs of water intrusion, mold, or pest activity. Ensure vapor barriers are intact and check for settling or gaps, especially after heavy rain. Clear gutters and maintain proper ventilation to prevent moisture buildup. Spray foam insulation needs only visual checks, while fiberglass or cellulose may require occasional replenishing in older Seattle homes.

Helpful?

In Seattle, insulation contractors often specialize in areas like attic insulation, crawl space insulation, and spray foam applications tailored for the region’s damp climate. Some focus on retrofitting older craftsman or bungalow homes common in Seattle, while others handle commercial or multifamily buildings. Energy efficiency consultants may also offer home energy audits, helping homeowners choose the best insulation type for Seattle’s frequent rain and variable temperatures.

Helpful?

In Seattle, be wary of insulation contractors who skip a thorough inspection of your attic or crawl space before quoting. Watch for vague estimates lacking details on materials or R-values suitable for Seattle’s climate. Avoid those who rush decisions, lack proof of insurance, or don’t address moisture control—critical in Seattle’s wet weather. Always insist on a written contract and clear explanation of the insulation process.

Helpful?

Seattle homes, especially those built before 1980 or with unfinished basements and attics, often benefit from added insulation. Signs include chilly rooms above garages, persistent condensation in crawl spaces, and high heating bills during Seattle’s damp winters. If your home has drafty windows or uneven temperatures between floors, consider a professional energy audit to assess where attic or crawl space insulation upgrades could improve comfort and efficiency.

Helpful?

Upgrading insulation in Seattle provides immediate relief from drafts and helps maintain steady indoor temperatures despite the city’s rainy, cool climate. In the long term, improved attic and crawl space insulation can lower energy use, reduce strain on your HVAC system, and boost home resale value. Enhanced insulation also helps prevent moisture issues, supporting healthier indoor air and quieter living spaces unique to Seattle’s urban environment.

Helpful?

The Seattle, WA homeowners’ guide to insulation services

From average costs to expert advice, get all the answers you need to get your job done.