• 770 Industrial Drive Unit A, Cary, IL 60013
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Call Your Local Pros Today! (800) 836-2535



  • "Timely, quick, professional and reasonably priced."

    Customer: Alex Attiah
    Date: 11/24/2021

  • "Very professional!"

    Customer: Gilbert Tognarelli
    Date: 10/07/2021

  • "The company did an incredible job! Extremely polite technicians, and super fast working! I have three small kids and they were very accommodating to their nap schedules. I highly recommend this company for anyone needing insulation work done!"

    Customer: Christina Macleod
    Date: 08/04/2021

  • "Very professional and conscientious employees. They did an excellent job and cleaned up beyond expectations."

    Customer: Jim McNutt
    Date: 08/04/2021

  • "I've known John for many years and referred contractors and homeowners to him. I tell the people if you want the best and no problems, then John is the guy to go to. I hear a lot of positive feedback, so when I built my house the only person to call was John, and his entire crew did a fabulous job.
    Thank you!"

    Customer: Michael
    Date: 04/12/2021

  • "Outstanding work and excellent customer service. Timely, professional and knowledgeable."

    Customer: Jim & Cheryl
    Date: 04/12/2021

  • "John was a great guy. Installers were very professional and nice. Thanks again. We will be using John R and your company again."

    Customer: MJ Ridge Construction
    Date: 01/09/2021

  • "We were extremely pleased with the insulation that was put in our new building. It was done on time and the building was kept clean. the insulation has worked very well and we will definitely use Thermaseal again when we remodel our existing building."

    Customer: GRITS Partners LLC.
    Date: 01/09/2021

  • "I been using Thermaseal for a long time now. They are very professional! The job is down on time and on budget. They never ask for extra. Always pass an inspection."

    Customer: JOE
    Date: 11/12/2020

  • "Brad is awesome to work with and followed up with every detail he committed too.

    Thank you!"

    Customer: Craig
    Date: 10/01/2020
Products We Install

Our team installs both batt and blown-in fiberglass insulation.


Help prevent mold and excessive moisture infiltration in homes you build with our waterproofing services.


At Thermaseal / Lakeside Insulation, we understand the role a floor plays within a building system by controlling sound and fire.

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