Last updated:

Best Insulation Contractors in Seattle, WA

Our Recommended Top 4

We did the research for you!

  • Licensing
  • User Reviews
  • Mystery Shopping Calls

Our goal is to connect people with the best local professionals. We scored Seattle Insulation Contractors on more than 25 variables across five categories, and analyzed the results to give you a hand-picked list of the best.



4Top Picks

Learn about our selection process.


featured provider = Featured Provider

34803 27th Ave SW, Federal Way, WA 98023

Why choose this provider?

Precision Acoustical LLC serves the insulation needs of Seattle residents. The company's craftsmen have completed the acoustical apprenticeship program handling simple and complex ceiling insulation installation projects. Additional services are seismic upgrades, sound panel installations, tenant improvement, fiberglass resin panel replacement, and soundproofing. Its owner, Melvin Smith, has been in the acoustical ceiling sector for 40 years. Previous clients include Bank of America, The Old Spaghetti Factory, Pro Logis, Sushi Land, J C Penny's, and T-mobile.

Kirkland, WA 98033 Rating

Review Sources

4.5 (57)
5.0 (5)
5.0 (4)

Why choose this provider?

Specialty Insulation NW is a Better Business Bureau-accredited company located in Kirkland, Washington that was originally founded in 1969. They recognized a need in the community for quality installation services and created a response to that demand. The construction teams pride themselves on their expertise and professionalism, and on being capable of completing each job correctly the first time. Specialty Insulation NW offers a variety of services including insulation installation and removal, soundproofing, and rodent remediation for both residential and commercial clients alike. They are committed to using only the finest, environmentally conscious name brand materials like Knauf Insulation, EcoBatt, Jet Stream, Perimeter Plus, and Green Guard.

Seattle, WA 98103 Rating

Review Sources

3.5 (40)

Why choose this provider?

Clean Crawls is a leading crawlspace and attic weatherization and pest control provider located in Seattle, Washington that is proud to be a 10-year winner of the Angie's List Super Service Award. They were founded with a mission to provide quality services that give their clients the peace of mind associated with a healthy and clean living space. The team of specialists provide many services including attic and crawlspace insulation replacement and removal, vapor barrier removal and replacement, air sealing, crawlspace and attic deodorizing, heat duct and water pipe wrapping and insulation, pest control solutions, and eco-friendly options like spray foam, cotton batts, and cellulose blow-in.

Auburn, WA 98002 Rating

Why choose this provider?

Rainier Insulation Services, Inc. is a commercial and residential insulation company located in Auburn, Washington that prides itself on creating safe, comfortable, and energy-efficient environments for each of their clients. They boast more than 13 years of insulation experience, and maintain a genuine dedication to the wellbeing of clients and their families. Rainier Insulation Services, Inc. provides insulation services for residential spaces, commercial spaces, and remodels, as well as new construction insulation solutions. They use only the finest insulation materials such as fiberglass, cellulose, and spray foam insulation, which are designed to retain heat, thus lowering heating costs. Free, no-obligation estimates can be requested on their website, as well as a breakdown of the brands and ratings of the materials they use.

Compare our Top Insulation Contractors

NameExpertise RatingAddressPromotionsLearn more
Precision Acoustical LLC
34803 27th Ave SW, Federal Way, WA 98023
Specialty Insulation NW
Clean Crawls
Rainier Insulation Services, Inc.


  • Introduction

    Insulation is a crucial part of the building construction or renovation process, and having the right insulation in a structure can increase comfort, reduce energy costs, and minimize your carbon footprint. Because insulation comes in a variety of materials and forms, it can be difficult to choose what’s right for your project. Understanding the basics of insulation materials, measurement, and installation can help you choose the right product and professional installer for your home or business.

  • What is an insulator?

    An insulator is a substance that doesn’t readily conduct electricity, heat, or sound. In construction, insulators help keep heated and cooled air from passing through walls, ceilings, and floors to control energy costs, so interiors stay warmer in the winter and cooler in the summer. Insulators may also be used to soundproof rooms or protect against electrical shocks.

  • What does asbestos insulation look like?

    The most common type of asbestos insulation is vermiculite. This lightweight material is typically silvery-gold or grayish-brown with a pebble-like appearance. However, asbestos insulation also comes in other forms, including sheet-like wraps for use on pipes and HVAC ducting, and lumpy or snow-like loose-fill insulation commonly installed in attics and wall cavities.

  • Is plastic an insulator?

    Yes. Plastics are poor conductors of heat and electrical currents, so they function well as insulators. This man-made material may serve as insulation in vinyl siding, and because it’s moldable, it’s commonly used for wrapping wires.

  • What does insulation do?

    Insulation minimizes the exchange of heat in a structure. It can improve a building’s comfort by keeping it warmer when outside temperatures are cold and cooler when outside temperatures rise. It can also improve the efficiency of HVAC systems to reduce heating and cooling costs.

  • Is insulation flammable?

    Whether insulation is flammable depends on its composition. Most common insulation materials are designed to be fireproof or fire-resistant, but there are some, including spray foam and cellulose, that are flammable. Insulation materials may also include paper or foil backings, which may be flammable and should be treated with a fire retardant.

  • How do you find out how much insulation you need?

    To determine how much insulation you’ll need for a project, measure the height and length of the exterior walls. Multiple those two numbers to determine the square footage for each wall and then add them together. Repeat the measurement process for windows and doors and subtract that from the total.