Professional Insulation Services in Glen Carbon, IL

Hold heat on the coldest Illinois nights and stay cool in the muggiest weeks, while trimming your bills. It starts with a free, no-pressure evaluation from your local Glen Carbon crew.

Free, no-pressure visit

Same-week appointments

Trained, insured installers

Workmanship warranty

Tidy, one-day jobs

Utility rebate assistance

(314) 756-5661

4.9/5 from 581+ verified reviews

Talk to Our Glen Carbon Insulation Experts Today

"*" indicates required fields

This field is for validation purposes and should be left unchanged.

For Your Business

Commercial Insulation for Glen Carbon Properties

Builders, general contractors, and property owners around Glen Carbon count on us for large-scale insulation across the St. Louis metro and Metro East. We work on multifamily, warehouse, office, and new-construction projects.

Energy Code Compliance

Insulation specified to meet your project’s R-value and energy-code requirements.

Built to Spec

Materials and install methods matched to your architect’s and GC’s drawings.

Inspection-Ready Work

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

Request a Commercial Quote

Why Choose

Koala Insulation?

Every install backed by a workmanship warranty

No-cost, no-pressure evaluations & quotes

Help claiming available utility rebates

Most jobs completed in just one day

Your local Glen Carbon team, licensed and insured

Superior
Comfort

Lower
Energy Bill

Quieter
Home

Your Satisfaction is

Our Top Priority

The reviews tell the story. Read how Glen Carbon homeowners describe working with our crews.

Koala Insulation of Gateway West & Metro East IL place picture
4.9
Based on 581 reviews
powered by Google
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

The questions Glen Carbon homeowners bring up most, answered plainly. If we missed yours, give us a call at (314) 756-5661 or request a free quote.

Get a FREE Quote
What goes into the cost of insulation in Glen Carbon?

The cost of an insulation project in Glen Carbon comes down to a few things. It mostly comes down to the size of the space, the material you go with, from blown-in cellulose to fiberglass or spray foam, and the effort involved in access and air sealing. Removing wet or contaminated insulation and working around tight attic access can add to the effort. Many of these projects qualify for rebates through Ameren and other local utility programs, which can offset part of the cost. So rather than guess, we measure your space during a free on-site evaluation and give you a written, itemized quote.

Blown-in or spray foam for my Glen Carbon attic?

Most Glen Carbon attics do best with blown-in coverage and air sealing together, a smart pairing when you deal with the freeze-and-bake swing from January cold to July heat. That combination closes the air leaks and thin spots batts usually leave behind. Spray foam makes sense when you’re sealing the roof line or finishing the attic as living space. We’ll suggest the right product once we see your attic, not before.

What R-value do I need for an attic in Glen Carbon?

Glen Carbon sits in climate zone 4A, where the U.S. Department of Energy recommends about R-49 to R-60 for attics. It’s common to find the newer subdivisions growing around Glen Carbon sitting at only R-19 to R-30, well short of the target. The free evaluation includes measuring what’s up there now so you know the real number. Bringing an attic up to spec can also qualify for rebates through Ameren and other local utility programs.

Which towns near Glen Carbon do you cover?

Our Glen Carbon crew works throughout Glen Carbon and nearby areas including Edwardsville, Maryville, Collinsville, Troy, and Wood River. Not sure if you’re in range? Call (314) 756-5661 and we’ll confirm in about a minute.

Do I have to leave home during the install?

For blown-in insulation, plan on about a day, and there’s no need to leave your home. With spray foam, plan to stay elsewhere for about 24 hours during curing. We confirm which path fits your home during the free evaluation, well before install day.

Ready to stop heating the attic?

Set up a free attic evaluation this week. We offer same-week availability across Glen Carbon.

Get a FREE Quote