Professional Insulation Services in Saint Peters, MO

Cut your bills, keep the warmth in during icy Missouri winters, and beat the summer heat and humidity. Schedule a free, no-obligation evaluation with your Saint Peters insulation pros.

FREE on-site evaluation

Fast, same-week install

Trained, insured installers

Guaranteed workmanship

Clean, one-day service

Rebate-eligible upgrades

(314) 756-5661

4.9/5 from 581+ verified reviews

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Commercial Insulation

Commercial & New-Construction Insulation in Saint Peters

Across the St. Louis metro and Metro East, builders and property managers in and around Saint Peters turn to us for jobs too big for a handyman. Think apartment complexes, warehouses, offices, and new-construction shells.

Inspection-Ready Work

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

Energy Code Compliance

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

Single-Source Crew

One trained, insured team from walkthrough and quote to final sign-off.

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Why Homeowners Choose

Koala Insulation?

A workmanship warranty stands behind our work

Free evaluations with a written, itemized quote

Guidance on rebates and incentives

Most installs done in a single day

A licensed, insured Saint Peters crew

Superior
Comfort

Healthier
Air

Lower
Energy Bill

Proven Work,

Happy Homeowners

Hear it from local homeowners. Local customers share what it was like to work with our Saint Peters team.

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

Common questions from Saint Peters homeowners, answered by our local crew. Not covered here? Ring (314) 756-5661 or set up your free evaluation.

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What goes into the cost of insulation in Saint Peters?

Insulation pricing in Saint Peters is driven by the work your home actually needs. 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. Upgrades like this often qualify for rebates through Ameren and other local utility programs, and we’ll help with the paperwork. 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 Saint Peters attic?

Most Saint Peters attics do best with blown-in coverage and air sealing together, a smart pairing when you deal with ice storms in winter and heavy humidity in summer. Loose-fill settles into the odd spots batts can’t cover evenly. Where you need to air seal the roof deck or condition the attic, spray foam is the stronger option. We’ll suggest the right product once we see your attic, not before.

What R-value do I need for an attic in Saint Peters?

Saint Peters is in DOE climate zone 4A, which calls for attic insulation in the R-49 to R-60 range. Many of the suburban subdivisions throughout Saint Peters measure far lower, frequently in the R-19 to R-30 range. During the free evaluation we check your current R-value and tell you how far off you are.

Which towns near Saint Peters do you cover?

Besides Saint Peters, we regularly work in Saint Charles, O’Fallon, Cottleville, Dardenne Prairie, and Lake Saint Louis and the surrounding neighborhoods. Unsure if your street is covered? Dial (314) 756-5661 and we’ll check in a moment.

Do I have to leave home during the install?

Most jobs are done in a day, and you can go about your day at home during blown-in work. With spray foam, plan to stay elsewhere for about 24 hours during curing. Either way, we’ll walk you through the timeline before booking your Saint Peters job.

Ready to put your attic to work?

Get your free on-site evaluation on the calendar. Same-week slots are filling up across Saint Peters.

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