Professional Insulation Services in Granite City, IL

Lower your energy bills, hold heat through cold Illinois winters, and stay cool through hot, humid summers. It starts with a free, no-pressure evaluation from your local Granite City crew.

Free, no-pressure visit

Same-week appointments

Licensed & insured crews

Guaranteed workmanship

Clean, 1-day service

Rebate paperwork help

(314) 756-5661

4.9/5 from 581+ verified reviews

Talk to Our Granite City Insulation Experts Today

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Insulation Services for Granite City Homes

Residential Insulation

Professional insulation installation service for residential or commercial property improvement.

Spray Foam Insulation

Professional blown-in insulation installation service to improve residential or commercial property energy efficiency.

Blown In Attic Insulation

Insulation Removal Services

Batt Insulation Installation

Solar Attic Fans

Air Sealing Service

Crawl Space Encapsulation

Commercial Insulation Services

Blower Door Testing

Commercial Insulation

Commercial Insulation for Granite City Properties

Illinois contractors and commercial property owners bring us in for big jobs in Granite City and across the St. Louis metro and Metro East. We work on multifamily, warehouse, office, and new-construction projects.

Inspection-Ready Work

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

Minimal Disruption

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

Built to Spec

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

Professional commercial insulation installation for energy efficiency and improved building performance.

Office & Retail

Professional spray foam insulation application during a new construction project to improve energy efficiency and air sealing.

New Builds

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Koala Insulation professional reviewing an insulation guide with a homeowner

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Why Granite City Chooses

Koala Insulation?

Every install backed by a workmanship warranty

FREE on-site evaluations & written quotes

Guidance on rebates and incentives

Most installs done in a single day

Locally licensed, insured Granite City team

Faster
Payback

Quieter
Home

Fewer
Drafts

Trusted by

Local Homeowners

See what your neighbors say. The feedback from Granite City homeowners speaks for the work.

Koala Insulation of Gateway West & Metro East IL

4.9

Based on 581 reviews

review us on

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

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

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

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

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

Straight answers to the questions we get most around Granite City. Something we missed? Call (314) 756-5661 or book your free quote now.

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What does insulation cost in Granite City?

The cost of an insulation project in Granite City comes down to a few things. Square footage, the product you choose from blown-in cellulose to spray foam, and the labor to prep the space and seal air leaks are the main drivers. Book a free evaluation and we’ll give you a clear, written quote for your Granite City home, with no pressure.

Which insulation is best for homes in Granite City?

Most Granite City attics do best with blown-in coverage and air sealing together, a smart pairing when you deal with sharp seasonal swings between cold and heat. Loose-fill settles into the odd spots batts can’t cover evenly. Spray foam makes sense when you’re sealing the roof line or finishing the attic as living space. We recommend a type after we’ve been in your attic, not before.

What’s the recommended R-value for Granite City attics?

Homes in Granite City fall in climate zone 4A, and the Department of Energy recommends roughly R-49 to R-60 of attic insulation there. Plenty of the older, established homes across Granite City come in well under that, often around R-19 to R-30. During the free evaluation we check your current R-value and tell you how far off you are. Bringing an attic up to spec can also qualify for rebates through Ameren and other local utility programs.

What areas around Granite City do you serve?

Our Granite City crew works throughout Granite City and nearby areas including Madison, Pontoon Beach, Collinsville, Mitchell, and Venice. If you’re not sure we reach you, call (314) 756-5661 and we’ll check your address.

How long does the job take, and do I need to leave the house?

Blown-in attic insulation is typically finished in one day, with no need to pack up and leave. If the job is spray foam, you’ll want to be away for about 24 hours while it fully cures. We’ll tell you which applies to your Granite City home before we schedule anything.

Ready for a more comfortable home?

Lock in your free in-home evaluation today. We can usually reach Granite City homes within the week.

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