Professional Insulation Services in Maryville, IL

Keep the January cold out and the July heat at bay, and spend less on energy all year in your Illinois home. Book a free in-home evaluation with Maryville’s insulation experts.

FREE in-home evaluation

Same-week appointments

Licensed & insured pros

Workmanship warranty

Clean, 1-day service

Rebate-eligible upgrades

(314) 756-5661

4.9/5 from 581+ verified reviews

Talk to Our Maryville Insulation Experts Today

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Commercial & New Build

Commercial & New-Construction Insulation in Maryville

Across the St. Louis metro and Metro East, builders and property managers in and around Maryville turn to us for jobs too big for a handyman. Our crews cover multifamily buildings, warehouses, retail, and ground-up builds.

Minimal Disruption

Clean, contained work that keeps an occupied building running while we insulate.

Large-Project Experience

Crews and equipment ready for multifamily, warehouse, and new-construction square footage.

Inspection-Ready Work

Documentation and coverage that hold up from rough-in through final inspection.

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Why Homeowners Choose

Koala Insulation?

Workmanship warranty on every install

Free evaluations with a written, itemized quote

Guidance on rebates and incentives

Most installs done in a single day

Your local Maryville team, licensed and insured

Fewer
Drafts

Superior
Comfort

Even
Temperatures

Our Promise is

Your Comfort

Ask around the neighborhood. Find out why Maryville homeowners recommend our work to their neighbors.

Koala Insulation of Gateway West & Metro East IL place picture
4.9
Based on 581 reviews
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Joseph Beaubien profile picture
Joseph Beaubien
22:18 15 Jul 26
Amazing experience. Koala came out in the blistering heat to help assess our very old attic insulation and not only gave a quote but spent the time answering our questions and educating us on the science behind the process. We had a second floor that was unlivable in the summer months for years. Just a few days after the new R-60 insulation our second floor is easily 15-20 degrees cooler even in the hottest day. I couldn’t be more greatfull for the prompt professional service and installation. Would highly recommend! Thanks Joe and team!!
Andrew Carver profile picture
Andrew Carver
21:06 13 Jul 26
Josh and CJ were great. They were right on time, efficient, professional, and Josh answered all of our questions. I especially appreciated Josh’s knowledge of the end-to-end process for Koala (and Ameren!).
D M profile picture
D M
16:05 15 May 26
This company does quality work! We have a 1930s house with a big squirrel issue in the attic. In addition to other repairs, we needed old insulation removal, enzyme cleaner applied, air sealing, and new insulation. They did all of this and took pictures every step of the way to update me. These guys had a very long day, but were extremely nice and hard-working. If I had to go through this process again, this is who I’d pick in a heartbeat .
Dan Shern profile picture
Dan Shern
14:56 14 May 26
We recently had Koala Insulation blow insulation into our attic and install a Draft Master, and the difference has been noticeable immediately. They also sprayed Attic Fresh throughout the attic, and it honestly made the whole space feel like a brand new build.

Upstairs is already feeling more comfortable, and you can tell the home is holding temperature better. The crew was professional, courteous, and took great care throughout the entire process. They explained everything clearly, worked efficiently, and left everything clean when they finished.

Overall, a great experience from start to finish. I’d definitely recommend Koala Insulation to anyone looking to improve their home’s comfort and energy efficiency.
Ken Kriegshauser profile picture
Ken Kriegshauser
15:19 20 Apr 26
I found Koala Insulation through the Ameren/Spire Pays program. We needed a lot more insulation up in the attic to help with our comfort in the house. Josh and crew came on time and were great to work with. They took care working in the house. They put down plastic on the floors where they were running their tube. At one point their tube sprung a leak outside in the yard. They took the time to vacuum up all the stuff that blew into the yard to make it look good. They answered all my questions and even made a few suggestions that I could do to help with my attic in the future. I would highly recommend them.

Frequently Asked

Questions

Before you book, here is what Maryville homeowners usually want to know. Got a different question? Reach the local team at (314) 756-5661.

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How much does insulation cost in Maryville?

Insulation pricing in Maryville is driven by the work your home actually needs. The big ones are how much area we’re covering, the type of insulation you choose, whether that’s blown-in cellulose, fiberglass, or spray foam, and how much prep the job takes. Removing wet or contaminated insulation and working around tight attic access can add to the effort. That’s why every quote is on-site, written, and itemized, so you see exactly what you’re paying for before anything starts.

What’s the best attic insulation for Maryville?

For most Maryville homes, blown-in insulation over the attic floor plus air sealing gives you the most comfort for the money, especially with cold, icy winters and hot, humid summers. That combination closes the air leaks and thin spots batts usually leave behind. Spray foam is the better call when you want to seal the roof deck itself or turn the attic into conditioned space. Which one is right depends on your attic, so we look first and advise second.

How thick should my Maryville attic insulation be?

Maryville is in DOE climate zone 4A, which calls for attic insulation in the R-49 to R-60 range. Many of the newer homes in and around the village of Maryville measure far lower, frequently in the R-19 to R-30 range. We measure what you have now during the free evaluation and show you exactly where you stand.

Do you serve my neighborhood near Maryville?

We cover Maryville along with neighboring towns such as Edwardsville, Glen Carbon, Collinsville, Troy, and Granite City and the communities around them. If you’re not sure we reach you, call (314) 756-5661 and we’ll check your address.

How long will my insulation project take?

Most jobs are done in a day, and you can go about your day at home during blown-in work. Spray foam is the exception, since you’ll need to be out of the house for roughly 24 hours while it cures. We’ll tell you which applies to your Maryville home before we schedule anything.

Let’s make your home more efficient.

Claim your free, no-obligation evaluation now. Same-week appointments are open across Maryville.

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