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Top-Rated Insulation pros in Unalaska - 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 Unalaska, AK and surrounding areas

Approved

In business since 2006

Free estimates

Warranties offered

"We've used PolySeal twice now to insulate our homes and have been extremely satisfied with the result."
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+5

7 neighbors recently requested a quote
Recommended by100%of homeowners
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Avatar for Xtreme Alaska Spray Foam, LLC
Xtreme Alaska Spray Foam, LLC
4.3(
6
)
Spray Foam Insulation - Install

Serving Unalaska, AK and surrounding areas

In business since 2018

Free estimates

Small jobs welcome

"They are easy to deal with, did a great job, and cleaned up well. Very good experience all around."
Insulation metal shop
Metal shop in pal.er
Response time1 day
11 neighbors recently requested a quote
Recommended by100%of homeowners
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Avatar for Avendano Services, LLC
Avendano Services, LLC
5.0(
2
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Unalaska, AK and surrounding areas

In business since 2009

Free estimates

Credit card accepted

"It was amazing, he was on time and the price was extremely reasonable."
Recommended by100%of homeowners
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Insulation FAQs, answered by experts

Insulating your home's exterior walls can realize up to a 20% reduction in your monthly energy bills. This means that regardless of how much the project costs, it can begin to pay you back immediately. Additionally, adding spray foam and other high-end materials can increase the selling value of the property.

A vapor barrier can last over 20 years, but they are vulnerable to pests, flooding, and other natural disasters. If your home weathers a storm or is treated for any pest infestation, make sure to have a drywall pro come check the integrity of your vapor barrier. It’s also important to have a pro install a vapor barrier since improper installation can lead to tears or leaks in the barrier that shorten its lifespan.

Unfaced wall insulation is easier to cut and install, making it the better choice for a DIY project. It’s also more affordable. But if it’s unfaced, you’ll likely need to add a vapor barrier to reach your desired R-value and efficiency, as it doesn’t offer any moisture barrier.

Faced insulation uses paper or foil to create a built-in barrier and doesn’t require an extra step. It’s also more fire-resistant and safe. But it’s quite a bit more expensive and a little bit harder to work with as a DIYer.

R-value stands for resistance value and is a number assigned to insulation that states how good the insulation is at heat transference (insulation). The R-value of injection foam is around 4 which homeowners will be happy to know is actually quite good. Another benefit of injection foam versus fiberglass foam is that the colder it gets, the more injection foam retains its resistance properties, whereas fiberglass tends to lose its efficiency in colder temperatures.

Minimal, mainly occasional checks for damage or mold in extreme conditions.

The Unalaska, AK homeowners’ guide to insulation services

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

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