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  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon437
    Verified insulation services reviews

Top-Rated Insulation pros in Sammamish - Updated Nov 2026

Avatar for Insulation Northwest
Insulation Northwest
4.8(
107
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeSpray Foam Insulation - Install+2 more

Serving Sammamish, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Warranties offered

"Zero complaints. I have worked with Insulation Northwest twice now and have been very satisfied both times. The sales agent worked with me to find the best and most cost-effective solution, the customer service team is responsive, and the installers were professional, curtious, and pleasant. I recommend Insulation Northwest for all your insulation needs!"
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17 neighbors recently requested a quote
Recommended by74%of homeowners
Avatar for PNW Insulation, LLC
PNW Insulation, LLC
4.7(
256
)
Spray Foam Insulation - InstallBlown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Sammamish, 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 rate93%
45 neighbors recently requested a quote
Avatar for Lake Atitlan Insulation, LLC
Lake Atitlan Insulation, LLC
5.0(
20
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Sammamish, WA and surrounding areas

Approved

In business since 2021

Free estimates

Credit card accepted

"We had Lake Atitlan Insulation remove our old insulation and replace it with R-38. I enjoyed working with Nanni from the initial meeting to the final step of installing the insulation. Very knowledgeable lady and truly exceptional customer service. A highly recommended insulation contractor."
8 neighbors recently requested a quote
Recommended by5%of homeowners
Avatar for Madrona Insulation
Madrona Insulation
4.9(
68
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeSpray Foam Insulation - Install+2 more

Serving Sammamish, 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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.
4 neighbors recently requested a quote
Recommended by96%of homeowners
Madrona Home Services, LLC
4.7(
74
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or Upgrade

Serving Sammamish, WA and surrounding areas

Approved

In business since 2010

Free estimates

Customers say: Quick response

"We had a wonderful attic insulation experience with Madrona Home Services! They had the best pricing, including the Puget Sound Energy discount and they managed all the paperwork. We were able to schedule two weeks after the quote, and their team worked fast and efficiently on installation day. They removed old saw dust insulation and laid down batting, as well as going above and beyond by creating an 8x8 storage platform. Our house feels noticably cozier with consistent temperatures. 10/10"
Response time1 day
6 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for AT Foam
AT Foam
5.0(
6
)
Spray Foam Insulation - Install

Serving Sammamish, 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 time10 hrs
Response rate98%
3 neighbors recently requested a quote
All Pros Insulation, LLC
5.0(
11
)
Batt, Rolled or Reflective Insulation - Install or UpgradeSpray Foam Insulation - InstallBlown-In Insulation - Install or Upgrade

Serving Sammamish, WA and surrounding areas

Approved

In business since 2022

Free estimates

Offers commercial services

"Great customer service! I am very pleased with the way they were so attentive and Iâ m happy the insulation inspection passed without any issues. Highly recommended."
Response time2 days
Response rate90%
12 neighbors recently requested a quote
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Insulation FAQs, answered by experts

Whether you should remove old insulation before blowing in new insulation depends on your particular situation. Fiberglass insulation attracts insects and mold over time, so if it has been decades since your last insulation upgrade, consider removing the old materials before placing the new ones. However, most types resist mold, insects, and mildew, so once you get the go-ahead from your contractor that your space is free from all three, feel free to install the new insulation directly on top of the pre-existing materials.

A radiant barrier is a form of insulation topped with a reflective material designed to keep homes cool during hotter months. It is generally considered worth the investment if you live in a hot, sunny climate, as the cost can be recouped over time through lower energy bills. Installation costs typically range from $0.10 to $1 per square foot. After installation, homeowners in warm climates may save between $7 and $15 per month, potentially reducing their electric bill by 5% to 10%. The exact savings will vary depending on your location and the type of barrier chosen.

Yes, you should insulate behind shower walls. Insulating helps prevent heat loss, which keeps the shower or tub from getting too cold and helps maintain a comfortable temperature in your bathroom. Additionally, proper insulation and air sealing can help prevent wall rot and moisture buildup. It is recommended to use a high R-value rated foam insulation combined with a vapor barrier.

Asbestos has many beneficial properties, including fire resistance, strength, and chemical resistance. It is also an excellent insulator, which is why it was used in pipe insulation and other building materials for decades. For all its benefits, asbestos is dangerous for human health, which is why it was eventually banned from use in certain products.

Insulating your basement walls offers numerous advantages that make the project well worth it. By adding insulation, you can reduce the chances of moisture damage to the house's structure and lower the odds of mold growth. You'll also add comfort to the space by reducing temperature swings and increasing your home's energy efficiency, potentially reducing your energy bills to earn your investment back.

The Sammamish, WA homeowners’ guide to insulation services

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