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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

8 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

The best R-value for home insulation depends on where you live and where you’re installing the insulation. Your climate zone plays the biggest role in determining the correct R-value, so be sure to know which zone you live in when determining the R-value you need.

Heat lost through uninsulated basement walls can account for up to 30% of the total energy lost through heat transfer to the outdoors. While homes in mild climates won't gain as much benefit from having an insulated basement as those in cold climates, the effects are still noticeable on your energy bill.

Mineral wool has an excellent life expectancy of up to 50 years, provided it's kept dry and free of pests. Compared to fiberglass, with a life span of 20 to 30 years, mineral wool stacks up well for long-term cost savings. Sheep wool maintains a similar life span to fiberglass, while estimates for hemp wool insulation life expectancies are all over the board, ranging anywhere from 20 to 100 years.

Monolithic slabs don’t require insulation, but many homeowners choose to have their contractors install insulation under the slab during construction. This can help improve home efficiency even more and keep indoor temperatures more stable. Slab foundations are more energy-efficient than uninsulated crawl spaces and basements, and insulated slab foundations are more energy-efficient than insulated crawl spaces and basements.

You should not put fiberglass insulation in basements, since fiberglass is known to trap mold and mold is more commonly grown and produced in basements. You should also avoid placing insulation near water heaters, oil burners, or other hot appliances. For more information about the best and worst places to install insulation, consider hiring an insulation professional.

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.