Get matched with top window repair pros in Gaithersburg, MD

"Our builder grade 1990s wood windows, door, transom and site-lite windows had all suffered from age and neglected painting. They were all long overdue for replacement and then we discovered Zen Windows of Washington, DC. They are consummate professionals. Their high quality, energy efficient products backed by a transferable lifetime warranty, strong technical knowledge, excellent value (price/quality relationship), pressure free consultative sales approach, and absolutely incredible install team left us 100% satisfied from beginning to end. The leader of the install team promised us that they would do the install as if it was his own home and actually did! I am very detail oriented and given the complexity of the job, their work was truly unbelievable. It’s perfect! Don’t waste your time with Andersen, Pella, Thompson Creek or others. Look no further than Zen Windows of Washington DC and work together with them to find the best solution for you. You will be very happy you did."

"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."

"This was our second time using Diaz for our painting and home renovations. Once again he and his team did an amazing job. For this job, we had Diaz paint our hallway and master, redo our stairs and stair railing, re-finish and stain the hardwood floors, remove old baseboard heaters, and do a complete renovation of our upstairs bathroom (new paint, new floors, new vanity, new toilet, new lighting, new exhaust fan, etc.). He also helped haul out old furniture, removed an old (non-functional) oil gas tank from the basement, and replaced a broken storm door. One of the great things about working with Diaz is that the answer is always yes. His team is more than just painters - he has skilled craftsmen, workers with expertise in plumbing and electric, and everything else. There is no need to deal with anyone else. If you need something done in (or around) your house Diaz either can do it or has a guy. After contacting Diaz, he came right out for a free estimate. He listened carefully to what we wanted but also made a number of important suggestions to improve the results. Each day his team was hard at work - they were trustworthy and courteous, and cleaned up perfectly each day. Diaz goes the extra mile to make things convenient - including hauling away trash/junk, recommending a local showroom, and picking up materials that we had ordered for the job. As with any major project, there were a few bumps in the road. But Diaz worked through the curveballs with good communication. They finished on-time and on budget, and the results were perfect. If you’re looking for versatility, reliability, attention to detail, and overall excellence, then Diaz is your man ."

"The work was very professional. The installation portion was absolutely wonderful. The staff here at Home Genius were really top tier."

"He did more than I was thinking of having done. He was very patient with me and when I first met him, he responded with other recommendations and it was what I didnt even think of doing and I have been so pleased. I cannot tell you how pleased I am. He was just very kind gentleman. I would definitely recommend him. "

"Matt Taylor was our service technician and he was knowledgeable and friendly. "

"I can’t say enough great things about Walter! He completed multiple projects in my home, and every single one was done with precision, professionalism, and attention to detail. From start to finish, he was reliable, communicative, and clearly takes pride in his work. He showed up on time, came prepared, and handled everything efficiently—no shortcuts, just quality craftsmanship. What really stood out to me was how he took the time to explain things, offered helpful suggestions, and made sure I was completely satisfied before wrapping up each project. It’s not easy finding someone you can trust in your home, but he exceeded all expectations. If you’re looking for someone dependable, skilled, and professional, I highly recommend him. I will definitely be using his services again!"

"I cannot say enough good things about FCB. Max bends over backwards to make sure the customer is completely satisfied. I’ve never had a more responsive and conscientious contractor. We had FCB replace all of our windows in 2022. We were so impressed by the quality work and price that we called them again to replace our storm door, front door, sidelights and shutters. Great experience. Highly recommend! "

"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."

"Mr. Chapman sent two of his contractors to help me to build two tacks and organize and store all of my personal items on the shelves in part of the basement and garage. The young men worked really hard for 7 hours non stop and they were perfect gentleman who followed instructions very well and they knew exactly what to do. If you need a handyman. I recommend them."