4.6 
37 *The Angi rating for Insulation Service companies in Diamond, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.
*The HomeAdvisor rating for Insulation Service companies in Diamond, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.
Last update on July 26, 2023
Serving Diamond, IL and surrounding areas
Approved
In business since 2025
Free estimates
Credit card accepted
"Ryan and Kevin are extremely honest, truthful, and real life humans. They stand on their business and execute work professionally. If you need attic work done, these are your guys!! Thank you both."
Serving Diamond, IL and surrounding areas
Approved
In business since 1975
Free estimates
Offers commercial services
"This company did a great job of insulating my pole barn. I would highly recommend them."
+13
Serving Diamond, IL and surrounding areas
Approved
In business since 2019
Free estimates
Emergency services offered
"Nick and his crew were so informative and pleasant to do business with. We had attics insulated, new vents installed, and outside blown-in cellulose, and they worked long hours to make sure everything was done correctly. I would definitely recommend this business. A great surprise was how the insulation muffled loud outside noises (fireworks and loud vehicles)."
Serving Diamond, IL and surrounding areas
Approved
In business since 2002
Free estimates
Credit card accepted
For the last 15 years, Arcos Environmental Services, Inc. has been serving as a general contractor for government weatherization programs. As we have continued to grow, we have created the subsidiary Arcos Pro Services to serve as our residential division of insulation installation using the same professional and detailed work. We are committed to giving homeowners a peace of mind in regards to their home's energy efficiency. \n\nArcos is also a Nicor Gas Contractor Circle member meaning finished upgrades to your home may qualify you for up to $1,250 in rebates as well as tax incentives. Check out our website for more information!\n\n
+3
Serving Diamond, IL and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"Even though we had a few days of rain, they continued working until they just had to stop. Sometimes being really soaked before coming down. That's dedication to doing a job."
Serving Diamond, IL and surrounding areas
Approved
In business since 1992
Free estimates
Credit card accepted
"Horn Insulation did a tremendous job insulating our house. The quality of their work was great and they were a pleasure to work with. I highly recommend them!"
Serving Diamond, IL and surrounding areas
Approved
Super Service Award Winner
In business since 1979
Free estimates
Emergency services offered
"The Permaseal team was excellent and did a great job. They did everything for insulating my attic with incredible professionalism. Always kept me in the loop and left the job site clean every day. I would highly recommend them"
+48
Serving Diamond, IL and surrounding areas
Approved
In business since 2020
Free estimates
Emergency services offered
I pride myself on my professionalism, as well as my ability to complete every job to the homeowner's total satisfaction. I never leave a job unfinished, or a homeowner not 100% satisfied with my level of service - Call today!
Serving Diamond, IL and surrounding areas
Approved
Free estimates
Warranties offered
Small jobs welcome
At HeatLock Insulation, we specialize in high-performance insulation solutions designed to make homes and commercial buildings more energy-efficient, comfortable, and protected year-round. Based in Illinois, our team delivers professional insulation services with a focus on quality craftsmanship, reliability, and long-term energy savings.\n\nWe provide expert installation of spray foam insulation, attic insulation, wall insulation, crawl space insulation and air-sealing systems forth residential and commercial properties. Whether it's a new construction project, renovation, or energy-efficient upgrade, HeatLock Insulation helps seal air leaks, regulate indoor temperatures, reduce noise, and lower monthly utility costs.
Serving Diamond, IL and surrounding areas
In business since 2009
Free estimates
Warranties offered
"overall the experience with USA Insulation was a positive one from the initial contact to the finished job ."
+6
From average costs to expert advice, get all the answers you need to get your job done.
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