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"Responsive, responsible and did all that was promised. Promply corrected small mistake."

"Carlos was very friendly and knowledgeable. I will use him for a future project."

"While I appreciate the company's attempt to rectify initial issues, our overall experience with this solar installation was unfortunately very unprofessional. The initial installation team demonstrated a lack of respect for our property, damaging plants, leaving debris (including an orange cone), and inappropriately using our private bathroom despite a readily available public restroom on the premises. Following my initial negative review, the company offered a Home Depot gift card as compensation, which wasn't particularly useful to us. They also offered to address some unrelated roof repairs they noticed, but I questioned why these weren't addressed during the original solar installation. Scheduling follow-up work proved equally frustrating. An appointment was scheduled for Wednesday, but the crew arrived a day early on Tuesday without prior communication. While I appreciated them attempting to complete the work ahead of schedule, they left the roof partially finished overnight, exposed to potential weather damage. Furthermore, the crew damaged another plant box during the Tuesday work and continued noisy work – including banging on the roof – until 8:30 PM on Wednesday, violating DC noise ordinances that typically require work to conclude by 7:30 PM. This put us at risk of a city violation. Throughout the entire process, communication was poor and the lack of consideration for our property and local regulations was deeply concerning. While I appreciate the attempt to make things right, the experience was ultimately not ideal and left us feeling very dissatisfied."

"Great.good job"

"The salesman was late. The person taking measurements missed a window rushing before his vacation. Which in turn delayed our project 2 weeks. The installers damaged our new porch and installed 5 defective windows. We have had 0 updates on how our windows and home will he repaired but we have received numerous. Text, emails, and posted mail begging for 5 stars including a gift card as a thanks. It has now been over 5 months and we still have windows that need to be replaced and Window Nation has fraudulently told the finance department the job is complete so we now need to pay for a job that is not completed. Avoid this company if possible."

"We met with Ryan and Pete who were both extremely professional and knowledgeable. They met with my husband and I discuss new windows for the main floor of our single family home. We have a toddler and newborn and Ryan helped keep our toddler occupied and was very understanding and patient as we had to multitask in taking care of our kids while also discussing the window project. We were impressed by their warm, genuine approach which is very different from a typical salesperson trying to get you to go with their product. You could tell they truly believed in the company, the goals and values, and the product/services they provide. Due to personal reasons we weren’t able to invest in the project right now but we will 100% be contacting Ryan in the future and using Peak for all our future window/roofing needs. When you find a good, reliable company like Peak you want to make sure to spread the word and we will be recommending them to our family/friends/neighbors who need any projects done in their homes."

"Had windows and doors installed by this company. The window installation went great. The bad news is that they do not seem competent at installing door hardware. My door has not latched properly since they made some unwanted modifications to the hardware (it worked perfectly before they started modifying it).have had them out three separate times to fix the issue they caused with the door latch and lock. Every “fix” they do seems to make the problem worse. I would steer clear of this company for door installations."

"Love our new Grand View Windows from Window Nation 17 Windows and 1 Sliding Glass Door We did quite a bit of research, explored a lot of companies and choose Window Nation for our project. And we are happy we did. The whole process from presentation to installation was easy and efficient. Reza arrived at our house on time for the presentation. He inspected and measured our windows and then launched into the presentation. Reza is knowledgeable about the Window Nation offering as well as the products offered by his competitors. As mentioned, I did some research and had an idea of the features that we wanted and what we should pay. Reza presented the Window Nation Grand View line, which meets our feature requirements, and after a bit of back-and-forth negotiation we settled on a price that was within our range and fair to us both. After signing, Reza described the next steps and set expectations. Overall, the presentation took only about an hour and was relatively painless, with no high-pressure tactics. Several days later, Mike came by to inspect our windows and confirm measurements for the build specifications. This took only about a half-hour. Mike answered some questions about the installation process and said that the windows and door could take up to 6 weeks to build. Imagine our surprise when we received a call a week later to schedule our installation. On installation day, the three-man team arrived on time. They introduced themselves and the team lead, Ted, described the process and then they got right to work. They tarped the paths to all the windows to protect the floors. They were very careful and respectful of our house. The entire team was friendly and polite and experienced and highly skilled. You could tell that they’d done this a time or two. The outside trim work is fantastic and the inside finish work is great. All 17 windows and the sliding door were installed in a single day. Ted went over the operation of the windows and door. The windows and door look and function great. We couldn’t be happier. If you are considering a window or door replacement project, we strongly recommend that you engage Window Nation. They will treat you right."

"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."