Certified Window replaced my Andersen brand patio door and double hung windows (5) in my…read morecondominium unit. We've went through a historically cold period in Chicago and the windows made a significant difference on the indoor temperature of my unit. No more drafts and swirling chilly air close to the patio doors or windows. All the glass is still clear, no leakage despite the bone chilling frightful temperatures outside and a couple nights of horizontal freezing rain. I'm a retired trades worker with over 30 years of experience. From my observation viewpoint the installers engaged in best practices. The worksite was broom clean when the workers left. There was some dust, but it's construction. I happened to catch a windy day in mid November, which is on me since I didn't start getting estimates until the end of September. The installation beat the first snowfall by a three days. Timing was perfect as it was an insect free experience. I had 3 estimates and Certified Window beat the other firms by a significant margin. I appreciated that they were located in the City of Chicago and have been in business since 1955, so they have a good track record of service in our community. I enjoyed collaborating with Frank Matz on the project and appreciate all of the hard work by the installers. I highly recommend Certified Window after their upgrading my patio doors and windows.

This crew is amazing - great work and great people. Thoughtful, trustworthy, reasonable and…read morehigh-quality outcomes. (*Background: After watching these guys work, what seemed like 24/7, on a complete apartment building rehab near me - it was readily apparent they're are about as good as it comes) Will absolutely be coming back any time I need their services.

I just had Thermalcraft finish a sliding patio door installation. I worked with Barry several weeks…read moreago to go over option that would fit our space and budget. After the doors were ordered and delivered, the team promptly scheduled an installation and arrived on time. the team was very professional and quick, and took the time to explain the different steps of the process as they were installing. Great team! Highly recommend!

We were in the market for a new patio door because our dogs had done a number on our old wood door…read more We worked through 3 different quotes and ultimately decided on Thermalcraft. Barry understood our needs, the price was less than some of the other competitors but not so much that I worried about quality. From ordering the custom door to the date of install was only a couple of weeks. On the date of install, Nick arrived early and got right to work. The door was installed, looks great and Nick did a great job of cleaning up. I had a question about the door the next day and Barry came out and cleared up that question in minutes. We will definitely use thermalcraft in the future!

John and his team were top notch. We dealt with this in October 2018 and had our windows for about…read moresix months. Our home required about 26 windows including double hung, picture, and sliders. John met me at my home in the late evening and provided a quote. There's no sales pitch, used car salesman tactics, demonstrations that have little real-world results, etc. With other Window companies, they push their "Cadillac" windows that give a marginal performance increase for an exponential cost. Not with Best Windows. I knew beforehand they installed Kensington brand windows. They started with the manufacturer's basic line. I inquired about the mid-level line and John provided his input on why he didn't think they were really worth the additional investment. John's pricing was straightforward. There was no "oh you get a Yelp discount" or "oops I forgot to add a window to your quote, I'll throw that in for free." It was refreshing to talk to a non-pushy company for once. We went with John and his installer Chris put them in our home about six weeks later. Took about a day and a half. His crew showed up about an hour earlier and were super fast! The windows are awesome and have already saved on my heating bill this past winter.

We bought our windows from Best Windows back in 2017, and while some seals eventually failed, the…read morecompany honored their lifetime guarantee without hesitation. John, the owner, was incredibly professional and helpful--he personally replaced the windows just yesterday. It's rare to find a business that truly stands behind its product and delivers great customer service years down the line. Highly recommend Best Windows and John for anyone looking for quality products and a company that keeps its word!

Couldn't be more pleased with the service, cost, and overall responsiveness of this company. We…read morechose Cook County Windows out of several bids because of the reviews on yelp and because they offered the most reasonable quote. We were nervous because we were installing three new windows on a blank wall of the living room of our 100 year-old house. Now the job is done and we couldn't be happier. Jacob and his assistant came out to give a quote quickly and showed up when they said they would. They explained the process thoroughly. They were extremely responsive to my emails before the installation. During the installation, they were quick, clean, courteous and thorough. Most importantly, the windows look awesome. Several people said they look like they have always been there. Looking forward to using Cook County Windows again to replace old windows in our bedroom soon! Use this company, you wont regret it

Sooo, I met Jacob, he got here in time, told him what I needed ,he measure the window, it's a…read morecustom size , turn time would be approximately 3 weeks, not my timeline, need it sooner, so he came up with a brilliant idea to use what was in stock and frame it out, fantastic, he could have just walked away, he came up a solution, now I have a beautiful window in my garage, others were rotten, needed asap for appraisal, they came 45 minutes later done, I chose them because they were in the neighborhood and will recommend them to anybody needing windows.Btw nice guys and they know what they are doing, give them a call, I'm glad I did!!

We needed a glass replaced on a top panel of a 20 year old double hung kitchen window, plus, a…read morecouple of latches on other windows. The process was ultra simple, yet precise and quick at a very reasonable cost. The original window measurements, model, etc are kept on file tied to the serial/model number unique to each window.

My contractor ordered windows for my house, beginning of November 2025…read more2 windows with the two little side panels, only special thing about those windows. We ask black color on the outside white on the inside first they say they did opposite way colors second order they say something else was screw up. It's middle of October 2026. I still don't have any windows they do run around does not wanna provide Windows or return money If I could, I will leave -10 star

When my wife and I moved into our first home we were super excited...and scared. We didn't know…read morewhat was going to be that first surprise cost as homeowners. After moving into a place that is very close to the L and about 17 years old we soon discovered our windows needed to be replaced. Not only were they hardly blocking any sound of the trains going by, but the wood around them was starting to rot. We did a lot of research and called quite a few vendors one of which was Marvin. The rep they suggested was Revisions and boy am I glad that we go them. Patrick was the first person we met who came by our place to chat about options. He knew his stuff and had a laptop with him to easily pull up info he didn't have off the top of his head. After making our selection we met Rob who would be doing the actual install. He stopped by to make some final measurements and was very personable and even answered some extra questions we forgot to ask Patrick. On the day of the install Rob and Leo, another employee, came in and got the old windows out and the new ones up in about 8 hours. The new windows look great and they block out SO much more noise. Rob and Leo even added some more insulation to help with the cold winters and added some wood panels to sections of our frames that weren't looking so nice. My wife and I are more than pleased with the outcome and I highly recommend Revisions if you're looking for new windows.

Horrible experience all around. This company should be out of business…read more We had (and continue to have) an incredibly frustrating experience dealing with Revisions Window & Door. Despite paying over $70,000 for new doors and windows for the front of our house, the experience and quality of the install and product are horrible. The installation resulted in one of the sidelight windows on our door being shattered, and the replacement process took over 8 months because they ordered the wrong size window for the initial replacement. We live in the heart of Chicago and this posed a safety concern. This also caused us significant financial losses because we rent our house for production and photo shoots and were unable to do so with a shattered front door (which is front and center in our living room). To make matters worse, Revisions refused to offer any form of discount or credit for their mistakes. During install they also realized they didn't measure a door frame correctly which resulted in a change order and them charging us more than our contractual agreement. However we just experienced the biggest issue less than a year after our doors and windows were installed. The recent snow and rain in Chicago revealed a major flaw - the french doors in our bedroom are leaking, allowing massive amounts of water to seep in, which has caused significant damage to the trim, flooring and ceiling on the floor below. This experience has been a nightmare and the worst experience I've ever had with a company. I would not recommend this company to anyone. They sell a commodity product -- look elsewhere and you will find much better quality and service. I wish I did.

I have had quite a bit of work done by this company and can recommend them very highly. Over a…read morenumber of years, I have had to replace quite a few large windows and a door, a very expensive proposition, so I comparison shopped. JC Lilly's quote was lower than the other two I got, which is part of why I initially went with them; partially, also, because of Justin's quick, friendly, and knowledgeable visit and evaluation. The windows and door are all beautiful, high-quality, and function flawlessly. In particular, though, I want to mention Swavek and his absolutely top-tier installation crew, to whom I am very grateful. None of these installations were easy or straightforward, and the guys were smart, resourceful, expert, very highly skilled, and delightful to deal with.

They were very responsive and when we understood that the work we needed was not the type that JC…read moreLilly covered, they referred us to several other companies that might be able to assist us with what we needed done. The referral was great to work with as well. This says a lot to me about how they run their business overall and I will definitely reach out to them in the future.

We recently had 100 year old bay non-opening bay windows replaced with new wood casement windows by…read moreSemko. The team was very responsive to both my initial quote, modifications, and inquiries. No pushy sales pitch and open for questions and suggestions. The new windows are beautiful, provide a ton of airflow in the casement design, and have received a lot of compliments. Installation was speedy and they replaced some areas of concern in rotten sills. Family run business where owners take pride in their craft.

I worked with Jay and Hal on getting 10 new windows and they were amazing throughout the whole…read moreprocess. They came out to measure everything we needed, quoted us on what we wanted and a few other optional windows as well since we were debating on doing everything at once. After selecting the quote for the windows we wanted to get done, a down payment was made and the windows were ordered. They came in a few weeks later and two of their team members came out to install them in the morning. Everything was done quickly and professionally with care. After the install, I had a question about one of the windows since it looked like there was a small crack at the top corner and they sent someone out to look at it right away. It turned out it was just some glue residue that was attached on the inside of the window that made it look like a crack and was easly scraped off with a razor blade. I definitley recommend using Semko as they provided a very reliable service and also beat out many other window companies with their competitive pricing.