
Serving North Chicago, IL and surrounding areas
Approved
In business since 1993
Free estimates
Warranties offered
"Everyone at Arc Insulation knew their product and were well versed in explaining the process. Overall happy with the work."





+8


Serving North Chicago, IL and surrounding areas
Approved
In business since 1993
Free estimates
Warranties offered
"Everyone at Arc Insulation knew their product and were well versed in explaining the process. Overall happy with the work."





+8

Serving North Chicago, IL and surrounding areas
Approved
In business since 2005
Free estimates
Emergency services offered
Mendieta Insulation, LLC, has over 15 years of experience providing our customers with quality work at a fair price. Give us a call today, and we will make sure to get your project done right the first time!





+7

Serving North Chicago, IL and surrounding areas
Approved
Super Service Award Winner
In business since 1993
Free estimates
Warranties offered
"Arc was great from the start. We were given a complimentary consultation by Steve Garrett, who gave us a detailed explanation on the issues we may have with our attic insulation and why our energy bills may be so high. We chose to have our attic insulated and our ducts sealed. Our ducts saw a 93.5% improvement, and we immediately noticed the difference in the temperature of our second floor. Even during this prolonged heat wave, we have been able to keep our temperatures much lower than before. The attic insulation has also decreased the temperatures of the upstairs. It has been a remarkable difference. We are fully expecting our house to be more comfortable in the winter as well. Steve is honest and reliable and we would not hesitate to recommend Arc to anyone who needs insulation and duct work."





+30

Serving North Chicago, IL and surrounding areas
Approved
In business since 1996
Free estimates
Warranties offered
"Attic Air absolutely lived up to their reputation. They did a GREAT job! I did my research in creating a short list of 3 bidders for the job. I have a bi-level house (4 levels) with 2 attics. We had black mold on the underside of the roof which we had remediated a week before having Attic Air come in to fix our ventilation and insulation issues. Our upstairs floor was cold in the winter and hot in the summer. The attic ventilation and insulation needed to get fixed, and I wanted to make sure I hired a good company to do it the right way so I never had to worry about it again. I made the right choice. The temperature throughout the house is so much more even now. Before Attic Air came out, the basement and sub-basement were freezing and the first and second floors were warm and hot. My over-sized top of the line Trane a/c unit was working overdrive to try to cool the 2nd floor and never could do it. The top floor is so much cooler now than before. It's really going to save my a/c unit in the long run. Attic Air was not the lowest bid of the 3, but you get what you pay for. If you want to get the best quality this is the company you want. I would haven't have changed a thing. Worth every penny!"

Serving North Chicago, IL and surrounding areas
Approved
In business since 2017
Free estimates
Credit card accepted
"Efficient and professional. The inspector on this new construction had one issue with insulation and Ryne came out that day and his guys corrected it that day. Smooth and on top of it. I wish all my subs were that good."

Serving North Chicago, IL and surrounding areas
Approved
In business since 2009
Free estimates
Emergency services offered
"I am very happy with the work done by Green Attic Insulation. David and Charlie were very friendly, professional, responsive, and flexible in working with my changing needs. I originally was looking into insulation but then discovered there was mold in my attic. As the job grew, David, Charlie, and their team worked with me to address the additional parts of the job. I really appreciate their knowledge and the thorough job they did. They took many pictures of their progress and kept me informed each step of the way. Thank you very much!"





+886

Serving North Chicago, IL and surrounding areas
Approved
Super Service Award Winner
In business since 2021
Credit card accepted
Offers commercial services
"ADL blew in some insulation into my attic and reinsulated a skylight. They were thorough and professional. ADL was mindful of my property and cleaned up the work area upon completion. I would definitely recommend them."





+12

Serving North Chicago, IL and surrounding areas
Approved
In business since 2014
Free estimates
Warranties offered
"We reached out to Dan with the issue of freezing pipes and cold rooms in our old house. Dan inspected the house and proposed a plan to remedy these issues. Aside from the more traditional air sealing and insulation solutions, Dan also recommended insulating the area of our house above our soffit, which was difficult to access but that appeared to be a major insulation issue. I should add the other firms we requested quotes for did not identify this area in their proposal. I firmly believe the proposals from the other firms would not have fixed our issues. Dan worked for ~2 weeks on air sealing our attic and house, adding insulation to our attic, removing our soffit and adding insulation and reinstalling soffit. Work was done well and within budget and at a fair price. Dan is very easy to work with and takes pride in his work. We are very happy to report our pipes have not frozen and the cold rooms are no longer cold - would highly recommend Dan to others - he went above and beyond."

Serving North Chicago, IL and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"I am very pleased with my new windows. I used Home Genius Exteriors to do my roof, gutter protection, and now Windows. This is an absolute amazing company, my salesman brendan was very helpful, Devan the Project Manager helped make sure everything went smoothly. Walter and Mike also from production were very friendly and professional. And Shawn, the window installer was polite,knowlagable, and efficient. And even cleaned up on his way out. Next on the agenda is to get a new door taken care of. Highly recommend HGE"

Serving North Chicago, IL and surrounding areas
Approved
Super Service Award Winner
In business since 1979
Free estimates
Emergency services offered
"James Ballard come out today to service my dehumidifier. He did a excellent job very professional. Will definitely use Perma Seal again. Thanks James"





+48
Old insulation should be removed when it shows damage, contamination, or heavy deterioration. If you notice water stains, rodent droppings, mold, or large gaps, plan on taking it out to protect your home’s energy performance and indoor air quality. Removing compromised material eliminates health hazards, cuts energy loss, and sets the stage for a safer, more efficient attic—all while keeping utility bills in check.
R-value measures how well insulation resists heat flow—the higher the number, the better it slows heat transfer. The right R-value keeps your home warmer in winter and cooler in summer, saving energy year-round. Match the rating to your climate zone and have a pro verify performance over time, because moisture or settling can lower R-value and cut efficiency.
Attic insulation can stay in place for 80 to 100 years, but its performance often drops after the first 15. As dust, moisture, or mold build up, the material loses R-value and allows heat to escape. Schedule periodic inspections so a pro can tell you when replacement makes sense—helping you keep energy bills down and indoor comfort up.
You can over-insulate an attic. Beyond the recommended R-value, extra layers don’t add efficiency and can trap moisture, leading to mold or reduced performance. A local insulation pro can measure current levels, confirm the right target for your climate, and advise on any adjustments so you avoid future energy or maintenance headaches.
Insulation can be damaged by mold, pests, water leaks, or accidental electrical contact. When the material is compromised, it loses R-value and can introduce health hazards. Removing and replacing affected sections restores efficiency, while routine inspections from a qualified pro help you catch problems early and keep your attic safe and energy-smart.
From average costs to expert advice, get all the answers you need to get your job done.

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