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Illinois Insulators

"It's Easy To See Why Your Heating Bills Are So High"

About Us

Since 2006, Illinois Insulators has proudly served as the go-to insulation expert for Downers Grove, IL, and surrounding communities including Lemont, Joliet, Homer Glen, and Lisle. With nearly two decades of experience, they’ve built a reputation for delivering high-quality, customized solutions in residential, commercial, and industrial insulation. Whether you're looking to improve energy efficiency, reduce noise, or enhance fire safety, their team offers specialized services in insulation, soundproofing, mold remediation, and fireproofing—all backed by expert knowledge and a commitment to customer care. If you're ready to make your space safer, healthier, and more efficient, contact Illinois Insulators today for trusted service and expert guidance.

Areas Served

Our Professional Associations

Better Business Bureau
Angie's List
HomeAdvisor

Our Certifications

Licensed
Bonded
Insured
Mold Remediation Certified

Languages Spoken

English
Spanish

What We Offer

Our Specialties include:

Illinois Insulators brings expert care and precision to every project, whether it's a cozy home, a bustling commercial space, or a large-scale industrial facility. Their team specializes in tailored insulation solutions that improve energy efficiency, comfort, and safety across all types of buildings. From attic upgrades in residential homes to complex insulation systems in warehouses and manufacturing plants, they handle it all with skill and dedication. In addition to insulation, Illinois Insulators offers comprehensive mold remediation services, helping property owners restore healthy indoor environments by safely removing mold and preventing future growth. With a reputation for reliability and results, they’re a trusted partner for insulation and air quality needs throughout Illinois.

Our Services include:

Insulation Services: At the heart of Illinois Insulators is a commitment to keeping homes comfortable and efficient. Their insulation services include everything from removing old or damaged insulation to installing fire-resistant materials and sealing rim joists—those critical gaps where air often sneaks in. Whether you're looking to soundproof a room, fireproof a space, or simply improve your home's thermal performance, their team ensures every layer of insulation is expertly handled.
Energy Efficiency & Home Performance: Illinois Insulators helps homeowners take control of their energy usage with a suite of performance-enhancing services. Through blower door tests and energy audits, they identify where homes are losing energy and offer solutions to seal those leaks. They also install bath fans and attic fans to improve ventilation and reduce moisture buildup, all while enhancing overall comfort and efficiency.
Indoor Air Quality: A healthy home starts with clean air. Illinois Insulators offers mold remediation to eliminate harmful spores, ozone air purification to neutralize odors and pollutants, and duct cleaning to ensure the air circulating through your home is fresh and safe. These services are designed to support better breathing, reduce allergens, and create a cleaner living environment for you and your family.

Our Brands include:

Owens Corning
Johns Manville

Our Products include:

Blown In Fiber Glass
Cellulose Insulation
Spray Foam
Bibs: (Blown in Blanket System)
Fiber Glass Batt
Electric and Solar Attic Fans
Rockwool Soundproofing Insulation

Testimonials

On 6/19/2026 Ted Ciciora had this to say:
Liam, who was the lead man on our job, came in well versed in what he was going to do for our home. Unfortunately, I can’t remember the names of the other two young men, but all three were very professional, took care of my home like it was their own. Took them longer to get to completion but I was not going to push these guys since it was very hot doing the work in the attic. It took 21/2 days for them to finish but didn’t care at all. Liam sent pictures of what he was doing from start to finish, and we are definitely happy with what was done. Testimonial written by Ted Ciciora on this site.

On 12/7/2025 Thomas Hanrahan had this to say:
I really appreciated the job completed by Illinois Insulators. Their communication, plan of action of what needed to be corrected and added along w clean up and price are Top Shelf. Testimonial written by Thomas Hanrahan on this site.

On 11/14/2025 Ed K. had this to say:
We recently hired Illinois Insulators in Downers Grove, Illinois, for insulation and mold remediation, and we couldn't be more impressed with the results. From start to finish, their team led by John was professional, thorough, and highly knowledgeable. They took the time to explain the entire process, answered all our questions and addressed all our concerns. The insulation work was completed efficiently and with great attention to detail. We noticed an improvement in comfort almost immediately. Their mold remediation services were equally outstanding--meticulous, safe, and effective. They addressed the issue at its source and left the space spotless and healthy. What stood out most was the team's courtesy and respect for our home. They arrived on time, worked cleanly, and treated the job with true care and expertise, and afterwards left our home as spotless as it was before they started. It's rare to find a company that combines quality workmanship with outstanding customer service, but Illinois Insulators delivered on all fronts. We highly recommend them to anyone needing insulation or mold remediation. Exceptional work and a great experience from beginning to end!

On 11/14/2025 ed kay had this to say:
We recently hired Illinois Insulators in Downers Grove, Illinois, for insulation and mold remediation, and we couldn’t be more impressed with the results. From start to finish, their team led by John was professional, thorough, and highly knowledgeable. They took the time to explain the entire process, answered all our questions and addressed all our concerns. The insulation work was completed efficiently and with great attention to detail. We noticed an improvement in comfort almost immediately. Their mold remediation services were equally outstanding—meticulous, safe, and effective. They addressed the issue at its source and left the space spotless and healthy. What stood out most was the team’s courtesy and respect for our home. They arrived on time, worked cleanly, and treated the job with true care and expertise, and afterwards left our home as spotless as it was before they started. It’s rare to find a company that combines quality workmanship with outstanding customer service, but Illinois Insulators delivered on all fronts. We highly recommend them to anyone needing insulation or mold remediation. Exceptional work and a great experience from beginning to end!

On 11/3/2025 Amy Chrzanowski had this to say:
Our experience with Illinois Insulators was all positive. They came on time, did their job efficiently, cleaned up perfectly and both John and Liam were very nice and polite. Their prices were great and if we ever needed their services again we would definitely call them. We would like to give an extra shout out to Liam for going above and beyond to make sure this picky woman was pleased with the job he did! Highly recommend!

Contact Us

Illinois Insulators
555 Rogers Downers Grove, IL 60515
Phone: (815) 846-4271
Mobile: (630) 674-4271
Email: info@illinoisinsulators.com

Where To Find Us

Payment Types Accepted

Visa, MasterCard, American Express, Personal Checks, Financing, Discover

Our Hours

Holiday Hours May Vary. Please Call For Details.

Monday: 6:45 AM - 5:00 PM
Tuesday: 6:45 AM - 5:00 PM
Wednesday: 6:45 AM - 5:00 PM
Thursday: 6:45 AM - 5:00 PM
Friday: 6:45 AM - 5:00 PM
Saturday: 7:00 AM - 1:00 PM

Info

Sound Control Insulation
Batt
Blown-In Insulation
Mold Remediation
Tips from the Experts

FAQ

What services do you offer?

Our offerings include:

Residential & commercial insulation (batts, blown-in, foam)
Sound-control insulation
Mold remediation
Energy audits
Roof insulation

Where are you located and what areas do you serve?

We’re based in Downers Grove, IL (555 Rogers St, Downers Grove, IL 60515) and serve the entire Chicagoland area, including Addison, Aurora, Bartlett, Bolingbrook, Chicago neighborhoods, and more.

Can you handle both new construction and existing building projects?

Yes, we work on new construction, renovations, and existing home re-insulation, including attics, walls, crawl spaces, and commercial structures.

Do you provide free estimates and energy audits?

Yes! We offer free estimates and energy audits, no trip charge. Our certified team will evaluate your needs and recommend the best solutions.

Are you licensed, insured, and BBB accredited?

We are licensed, bonded, and insured, and hold worker’s compensation coverage. We are also a BBB-accredited business with an A+ rating.