The only full time full service insulation contractor in North Central Illinois
Spray Foam Insulation
Air Sealing
Blown Insulation
Sidewall Insulation
Crawl Space Insulation
Home Energy Audits
Established in 1988
Located in Princeton, IL
- Anonymous
12/7/2025
"Illinois Valley Insulation did a great job with my home. They were thorough and really took the time to do the job well and were good at communicating too."
