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Top-Rated Insulation pros in Girdwood - Updated Nov 2026

Avatar for PolySeal Insulation LLC
PolySeal Insulation LLC
4.9(
18
)
Spray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or Upgrade+2 more

Serving Girdwood, AK and surrounding areas

Approved

In business since 2006

Free estimates

Warranties offered

"The Estimate: The representative arrived as scheduled. We entered the crawlspace and he examined the area to be insulated. Photos were taken. We discussed in depth the one area that might cause problems and insured that I was aware that area might be problematic. He asked if I had further questions then informed me he would get an estimate after discussing the job with others at the office. A few days later the estimate arrived and it indicated in detail what would be done. Everything was outlined as I requested, giving particular detail to the one problem area. The Scheduling: After accepting the work description I was contacted by a scheduler giving me a specific day that the work would be done. The job details were covered again, I was informed of the deposit required, and was insured the job would be completed as described. The actual work: The work crew arrived as scheduled and on time. The first worker arriving once again briefly discussed what would be done. A short time later the crew boss arrived and he insured me that the work would be done as required. We briefly discussed the one area (the problem area) of concern and I was informed he was aware and would do his best to complete it. The work began. All of the old insulation batting was removed, bagged, and taken out of the crawlspace. I was amazed that there was such a small quantity of existing insulation. All of the rim joist areas were filled with foam as specified, then thick batting was applied to the perimeter walls and sealed in place with foam. The problem area was “opened up” and the foam was blown into that area. Upon completion I was informed that it would smell for awhile in the crawlspace but nothing was hazardous about the odor. I was shown some photos of the work completed. Later in the day I inspected the area. The job was very complete. The concrete walls appeared as if a military drill instructor had supervised the work. Everything was cut level and even and looked very good. I looked at the problem area and was amazed at the great quality of the work. That evening I noticed that my furnace did not fire up as often as usual and that the back room of the house above the problem area was much warmer than before and now the same temperature as the rest of the house. Follow Up: Within a few days I was called by the scheduler and informed that if anything needed additional work, to give him a call. The final bill was sent. Recommendation: Polyseal insulation gets a very high recommendation from me. The company used the minimal number of workers required to do a fantastic job. The area was left free of debris and I was informed to call if anything was not done as expected."
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+5

7 neighbors recently requested a quote
Recommended by100%of homeowners
Polar North Insulation, LLC
4.6(
30
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+1 more

Serving Girdwood, AK and surrounding areas

In business since 2014

Free estimates

Emergency services offered

"They came in and gave me a quote and went to work i was pleased with all the work that they did. I would recommend them to anyone who needs they're house insulated."
Inside metal building
Inside metal building
Inside metal building
Steel building project
Fire retardant ground cover

+15

Response time1 day
Recommended by100%of homeowners
Avatar for Turnagain Spray Foam
Turnagain Spray Foam
5.0(
8
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - Install

Serving Girdwood, AK and surrounding areas

In business since 2024

Free estimates

Small jobs welcome

"Great locally owned company. Quick to come take a look at what I needed done and started on the job right away. Prices are very competitive. Really professional and clean. Would highly recommend and will be using them again."
Wasilla Spray Foam Shop
Wasilla Spray Foam Shop
Response time1 day
Response rate100%
Avatar for HENRY'S SERVICES INC
HENRY'S SERVICES INC
4.2(
12
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Girdwood, AK and surrounding areas

In business since 1962

Free estimates

Emergency services offered

"They sure took their time in doing things. Left things in the yard like screens that weren't damaged. didn't clean up messes. Didn't do add-ons I asked for. Did things I didn't want. No communication unless I called them. Mostly that is how contractors operate so I don't hold it against them too much We'll see when the bill comes. They should hire a woman to do their cleaning for them.
"
Recommended by75%of homeowners
Showing 1-10 of 12
Insulation FAQs, answered by experts

Yes, eco-friendly blown-in insulation options include materials made from recycled cellulose or wool. These offer excellent thermal performance and sustainability, reducing energy consumption and environmental impact while enhancing home efficiency.

STC (Sound Transmission Class) is a rating that describes how well a building material or assembly blocks airborne sound. A higher STC rating means less noise will pass through the material, providing better sound reduction. This rating system applies to various building components, including windows, doors, flooring, drywall, and insulation.

For context, a typical single-pane window has an STC rating of around 25 (where normal conversations are audible), while a well-sealed, double-pane window can exceed STC 45 (blocking loud speech and most music). It is important to note that for some products, like soundproofing drywall, the STC rating refers to the entire wall system, not just the individual panel.

Additionally, STC ratings are most effective for measuring sound reduction at mid-to-high frequencies, such as human speech, and may not accurately reflect how well a material blocks low-frequency sounds like bass music or thunder. Because of these factors, it is recommended to consult a professional to determine the right STC-rated materials for your specific soundproofing needs.

The most insulative type of insulation for behind drywall is spray foam insulation, but this is the most expensive insulation available. The most common insulation—sometimes considered the best for the value you get for the money—is fiberglass roll or fiberglass batt insulation, which is significantly more affordable but also far less insulative. The best kind of insulation for your house will also vary based on the climate in your area, your budget, and more. A professional insulation company can help you decide which type is best for your home.

When it comes to fiberglass insulation versus foam board, there are a few notable differences, both aesthetically and functionally. Fiberglass insulation is soft and flexible, meaning it can be squeezed into tight spaces more easily than foam board. Fiberglass insulation also has a higher R-value, making it a better pick for colder climates. However, foam board insulation can resist moisture and pest damage much better than fiberglass.

The ideal temperature for your garage in the winter is between 40 and 68 degrees Fahrenheit. Maintaining a minimum temperature of at least 40 to 50 degrees is crucial to prevent pipes, liquids, and other items from freezing. Low temperatures can also drain your car battery, so keeping the garage stable is vital for your vehicle. While the lower end of the range protects your belongings, the higher end is based on your personal preference for a comfortable space. If you struggle to keep the temperature from dropping below 40 degrees, consider installing a garage heater.

The Girdwood, AK homeowners’ guide to insulation services

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