Get matched with top window pros in Gaithersburg, MD

"The process with Zen Windows from start to finish was exemplary. David, the sales rep, the second measurer, office staff, James the production manager and Scott the owner could not have been more pleasant. We replaced 7 really bad windows and have just a few others to replace in addition to a new front door. The installers respected our home, did an excellent job from start to finish, couldn't be happier with the whole experience with Zen Windows!"

"Kenny and team were amazing to work with - professional, polite, honest, and finished the project ahead of schedule and at a very fair price. We had two old single pane windows replaced in our basement (which may have been 50+ years old), and a new window well installed. The work was very well done. I have since recommended Clifton to multiple friends and other contractors. Five stars."

"We just had Unicorp install new windows throughout our entire house. The window quality is excellent and the installation went very well. We were replacing 55 years old windows - and were very happy with the entire process, from selection, exterior color choices, and finally installation."

"The owner was very responsive, and did a great job ordering and replacing the window at a competitive price."

"The Premier Windows and Glass has provided an excellent service for me! A frame of one of the windows in my condo was broken, and I looked for a company that would fix it and prolong the life of the window. So, I was very happy to discover The Premier Windows and Glass. Their technician was very polite, professional, and knowledgeable. Not only did he do a quality job on fixing the frame, but he also explained to me what needs to be done to prevent the window from breaking down again and avoid paying a lot of money for its replacement. In addition, the manager and technician responded to my service request in a prompt manner. The problem was solved on the day when I called the company. Last but not least, the company offers competitive service rates and does not push people to spend more money than is absolutely necessary. I would strongly recommend this company to anyone who needs to have a window fixed or replaced."

"Windows were done in one day. Crew cleaned up nicely. Windows look great."

"Great company did awesome work for us. Need windows in the fall. We are looking to call them back."

Family owned business since 2015, licensed and insured. \nEither RESIDENTIAL OR COMMERCIAL Glass window&doors and sliding door repair , shower doors frameless or storefront installation and glass replacement , screens, mirrors or even table tops... \nDC glass technicians are available and on call 24/7 to provide you with assistance and help. \nThe glass we fit always conforms to the very latest American standards for energy and safety.. \nOur mission is your full satisfaction. \nWhen glass , just give us a call

"Universal windows delivered as promised. The installers were professional, courteous and thorough, right down to the cleanup. The windows look great and we look forward to functionality and energy savings."

"Very disappointed! In mid- August we contracted with this firm to replace four large custom size windows- 2 triangles, and 2 trapezoids. They estimated completion in 4-6 weeks. It actually took over 13 weeks with several “tries”. Furthermore, this project ended on a sour note. Just a few days after final installation, I noticed the caulking was already bubbling - dozens of bubbles ¼ - to ½ inch in size. When the owner emailed me asking for referrals, I responded saying that we needed a follow up visit to fix the caulk. That was almost 2 weeks ago and I have not received a reply. The contract required 100% payment on the completion date. As the consumer, that left us helpless when this problem arose just days after 'completion'. In the future, with any home improvement, I will require a 5% hold back for 2-4 weeks in case problems arise. Is the job complete? Not in my mind as the caulk issue has not been fixed. It seems that I will need to handle this myself. The caulk looks awful! Was it a disaster? No but it did not go very well. Needless to say, with all the home improvement contractors in Northern Virginia, I will NOT use this firm again. I will describe this project from three angles. Client interaction: C- The sales rep did not care about the project. We had multiple cases where the glass arrived damaged or was the wrong size. After the first problem, I called the sales rep and he was of no help and never called again to check up. Do not expect this person to be of any help. I then focused on working with the owner and project coordinator. They do not communicate well or frequently. I always felt in the dark. And their response to issues is extremely slow. The attitude seems to be "it is what it is and things will happen when they happen". At one point the owner told me “sometimes things have to get worse before they get better”. Workmanship: B Overall the workers were the best part of the experience. They definitely knew their jobs and worked carefully (see below), skillfully, and quickly. They protected the work area and cleaned up well. They seemed to have adequate tools and skill. I believe the caulk bubbling was due to weather conditions (humidity at end of day, etc.). Hard to say this is exactly their fault. They did one thing wrong from my point of view. Our home exterior is cedar siding. One of the cedar jambs was installed with the rough side showing instead of the smooth side. All the others are smooth side out. Not a big issue but enough to keep them from an "A " rating. Safety: C The windows are fairly high up (10-18 feet) and we noted on the contract the need for special scaffolding. For the first installation attempt, the workers did not bring scaffolding and tried to do the job with a couple of 6 foot step ladders and one extension ladder. It was so dangerous we took pictures and emailed them to the owner. We seriously thought about asking them to stop the project. These windows weigh hundreds of pounds and standing on the very top of a step ladder to handle them is extremely risky. But it turned out they only had one good window to install that day. Two others were the wrong size and a third one was damaged. For the final installation, they came with proper scaffolding. This employer not only put his workers at risk, but put us at risk as well. We could have been held responsible had there been an accident on our property. Job safety was clearly not a priority."