1. Building Energy Experts

    1. Building Energy Experts

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    Crystal Lake, IL

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    Building Energy Experts

    3.3 (18 reviews)
    Open 8:00 am - 6:00 pm

    Services - Building Energy Experts

    Solar system installation

    Building energy audit

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    2 years ago

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    Anthony S.

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    2 years ago

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    Anthony S.

    Thank you we appreciate the opportunity

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    5 years ago

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    Anthony S.

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    6 years ago

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    Anthony S.

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    11 years ago

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    7 years ago

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    Anthony S.

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    11 years ago

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    12 years ago

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    8 years ago

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    12 years ago

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    Review Highlights - Building Energy Experts

    Anthony did a great job in terms of explaining everything his company would do and why they take the approach that they do.

    Mentioned in 7 reviews

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    Paragon

    Paragon

    (91 reviews)

    Paragon Insulation has done an excellent job for me twice this year. The first time in January, I…read morehad Randy come out to quote attic sealing and insulation. While he was there to provide the quote, he noticed the kitchen floor was really cold (he took off his shoes when he entered the house). He pulled out his thermal camera and we saw the floor was 30-40F! I had noticed that area of the kitchen was cold in winter, but didn't realize it was coming from the floor, where kitchen is cantilevered out past the foundation wall. He proposed insulating the cantilevered area with spray foam, and then said he could insulate all the rim joists in the basement for the same price. A week or so later, while he was onsite doing the insulating, I mentioned I was going to finish the basement later in the year, and expected to use 3 inch foam panels. He suggested using spray foam instead since that would give me a few inches more space in the room. He gave me a price and I said I'd think about it. As I thought about it, I realized getting a few more inches in the room, and also getting a better sealing product would be worth it, and would save me many hours of labor and a lot of material costs. In summer, I started work on the basement project, and once I had the framing up and electrical roughed in, I called (now July) to schedule the spray foam. Randy honored the price from January, scheduled the job quickly, and it looks great! Something I especially appreciate about Randy and Paragon is that the guy who quotes the job actually does the job; it's not some sales guy, it's the owner who quotes AND does the work! Because of that, any questions get answered and you know exactly who is accountable for quality and completion. I did get other quotes for the attic, and Paragon was very competitive. I really appreciated Randy's suggestions, and they did not feel like a sales pitch; it felt like I was getting good options to consider that would solve a problem I had.

    Nobody enjoys pouring money into the parts of their home they never see -- attics, crawl spaces,…read moreand the like. But when those areas need attention, it's essential that the work is done right and by someone you can trust. Randy and the team at Paragon Insulation & Services delivered an experience I'd recommend to anyone. My attic was poorly ventilated -- damp, musty, and overdue for attention. After deciding to bring in a professional, Randy came out to my home, thoroughly assessed the problem areas, and put together a detailed quote on the spot. The scope of work included removal of the existing insulation, air sealing around all attic entry points, sanitizing, air baffle installation, and installation of new Weather Blanket cellulose insulation. The new cellulose achieves an R-value that meets or exceeds Illinois code requirements. Paragon's pricing was competitive, though admittedly a bit higher than some of the larger corporate outfits. What made the difference was Randy's willingness to walk me through the entire plan and clearly explain what justified the investment. That transparency, combined with the comfort of working with a local, owner-operated business, made the decision easy. The crew came in and completed the job in about half a day -- fast, efficient, and clean. The entire process was documented with photos and videos, all of which were included with the final invoice. While up in the attic, they even took the time to correct some substandard work a prior contractor had left behind on my bathroom exhaust fans. I couldn't be happier with the results. I've already noticed a meaningful improvement in temperature consistency and overall comfort throughout my home. If you're looking for a trustworthy, professional insulation contractor, I wouldn't hesitate to recommend Paragon Insulation & Services.

    Thermaseal Lakeside Insulation

    Thermaseal Lakeside Insulation

    (7 reviews)

    Really really disappointed with my recent experience with Thermaseal / Lakeside Insulation. I used…read morethem several years ago for a crawlspace insulation job and was happy with the work. I reached back out to them to redo the same work because some construction work damaged the insulation they installed. This experience was completely different even though I was working with the same contact (Bill). There was nothing but broken promises from the moment I reached them. Started with call backs, continued with onsite estimate meeting and continued with the failure to ever deliver the estimate. There must have been 5 or 6 times that Bill said he would call, or show up, or provide the estimate and each time it never happened. Ultimately, he just ghosted me and stopped responding. Not only was it a headache, it actually cost me money out-of-pocket to rush delivery from another contractor to finish the job by my needed date - which Bill repeatedly claimed he would meet. Literally tried my best to give them business with repeatedly reaching out...whole experience was miserable.

    i recently hired Thermaseal/Lakeside out of Cary to reinsulate my basement rim jioists and kneewall…read morewith closed cell foam insulation. The existng fiberglass batt insulation was deteriorated and in need of replacement. I received three estimates for the work from local contractors and all were similar in cost. The sales rep, Joe. quote was the most thorough and was genuinely interested in my job. The crew arrived on the date and time scheduled, completed the work as specified and cleaned up and disposed of all discarded materials. i do not usually write reviews for any work I have contracted for myself or my clients but I feel that it is justified in this case. Great job, well done ,by Joe and his crew! Glenn Vesely Illinois Licensed Architect/Professional Engineer AES Consultants Ltd.

    Building Energy Experts - solarinstallation - Updated September 2026

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