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Illinois Valley Insulation
"The only full time full service insulation contractor in North Central Illinois"
About Us
Illinois Valley Insulation, in Princeton, IL, is the leading insulation contractor with an A+ rating with the Better Business Bureau, serving Spring Valley, Ottawa, DeKalb, Rockford, Peru, and surrounding areas since 1988. Whether you're improving or remodeling an existing property or building a new one, you can count on our attentive work. We specialize in many kinds of insulation, including spray foam, blown fiberglass, and cellulose. For more information, contact Illinois Valley Insulation in Princeton.
Areas Served
DeKalb, IL | Streator, IL | Dixon, IL | La Salle, IL | Princeton, IL | Peru, IL | Ottawa, IL | Rochelle | Rockford, IL | Morris, IL | Geneseo, IL | Sterling, IL | Rockfalls | Lake Holiday, IL | Lake Carroll, IL | Oregon, IL | Henry | Hennepin | Chillicothe, IL | Seneca | Sparland, IL | Marsailles, IL
Our Certifications
- A+ Rating With BBB
What We Offer
Our Specialties include:
- Residential and Commercial Services
- Cellulose- Eco Friendly
- Chimney Cleaning
- Attic Insulation
Our Services include:
- Spray Foam Insulation
- Air Sealing
- Blown Insulation
- Sidewall Insulation
- Crawl Space Insulation
- Home Energy Audits
- Duct Cleaning
- New Home Construction
- Vacuum Insulation
- Insulation Removal
- Box Sill Insulation
- Thermal Imaging
- Chimney Cleaning
- Sound Insulation
- Sound Proofing
- Blower Door Testing
- Insulation For New Homes
Testimonials
On 10/29/2025
Ron J
had this to say:
Found Scott's business on the internet. He was quick to respond and to come look at my attic. Scott did a great job explaining how they would proceed. He called the day before and arrived on time. Didn't take long to set up or to finish the job. They did a great job of cleaning up. Everything your looking for from a contractor
Testimonial written by Ron J on this site.
On 10/23/2025
Donna
had this to say:
Scottie an excellent job of cleaning my wood stove out and chimney sweeping last week just in the nick of time for this cold spell we are having!
Testimonial written by Donna on this site.
On 3/5/2025
Anonymous
had this to say:
They did a great job putting insulation in our attic! Very friendly and respectful of our space, quick and straightforward with everything!
Testimonial submitted anonymously directly to this site.
On 1/22/2025
Dave White W.
had this to say:
We're having our chimney cleaned, and they are very knowledgeable and I believe will do a good job. they're careful not to make any messes. I'm impressed how the job is done from the bottom of the chimney up.
On 10/24/2024
Buzz and Tammy
had this to say:
Scott and Zach did a super job cleaning our chimney. They were extremely thorough. Left absolutely no mess at all!
We highly recommend them and will definitely use their service again!
Testimonial written by Buzz and Tammy on this site.
Contact Us
Illinois Valley Insulation
Princeton, IL 61356
Phone: (815) 875-1901
Where To Find Us
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Our Hours
Holiday Hours May Vary. Please Call For Details.
Monday: 7:00 AM - 6:00 PM
Tuesday: 7:00 AM - 6:00 PM
Wednesday: 7:00 AM - 6:00 PM
Thursday: 7:00 AM - 6:00 PM
Friday: 7:00 AM - 6:00 PM
Saturday: By Appointment Only
Sunday: By Appointment Only
Info
Air DuctAir Sealing
Blown
Sidewall
Crawl Space
Energy Audit
New Home
Chimney
Spray Foam
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