Nex-Gen Windows & Doors

We love the windows! The entire house was finished in one day and they cleaned up great. We have no drafts or streaking even after all the rain and wind. And the light is amazing, not to mention the price. We are so happy, we've just ordered doors. Highly recommend

Nex-Gen doors are high quality and come with a lifetime warranty! We had great, thorough service from Thomas and Xavier for some maintenance needs on our front entry door. So happy with this company and product!

I would highly recommend this company. We had these windows installed throughout our house and they look great. The installation was pretty quick. The few issues that came up, the company was quick to resolve.

We had Nex-Gen replace our windows and sliding glass door. Neil Horn was very professional. He answered my calls promptly, addressed every concern I had and has checked multiple times to ensure that we are happy with the work. Roberto and his crew did a good job on the installation. We are very pleased with our new windows and door and would highly recommend Nex-Gen.

I highly recommend Nex-Gen if you are looking for quality attractive windows and doors. I just had them out for the second time to install two doors and two windows. They replaced my other windows and doors a few years ago. I really noticed the reduction in heat and cold and just love the way they look so I knew Nex-Gen would be my go-to Company. I can't say enough about all the staff that I worked with. Justin, the sales rep, was great at coming up with options that met my budget while not sacrificing my wants. He even helped me out with some non-related home issues while here. Steve and Arthur worked tirelessly doing a meticulous job on the installation, making sure I knew everything about the products and made sure everything was cleaned up after the work. Neal did a great job managing the project and ensuring that I was totally satisfied while encouraging me to call with...

They have done it again! Reuben and his crew put in a new window, and my house looks amazing! They took out a fake bay window and transformed the entire look of my house. I can not say how wonderfully respectful, honest, and trustworthy the entire company is...Chris, Janice, Thomas, Reuben, etc....! If you need windows, doors , or now siding, these guys are the ones I would call first (it will be your only call).

Good experience overall. Very professional, good quality windows, and quick install.

In April, Nex-Gen Windows & Doors replaced the entry door along with 8 windows in our home. In the 4 months following the upgrade, we couldn’t be happier. The team was so friendly and helpful through the process. We never felt pressure to buy and there was no upselling or add-ons to the cost. The crew that performed the install was courteous, and I was surprised that the install was completed in a single day. Neil, the project manager, stopped by two times through the day to ensure the project was on track and answer any questions. The quality of the product has been impressive, and we love the look our custom front door. We definitely recommend doing business with Nex-Gen Windows & Doors.

I had quite a few different company come out to bid some replacement windows. Ended up going with Steve and Nex-Gen. Save yourself some time and just start with them. I found the pricing to be fair and the window quality is great. The biggest difference I noticed was the service. The installers were fantastic. They showed up right on time, spent the extra time to make sure they kept my brick molding usable, they were clean and efficient. Really impressed with that side of the installation.

Neil Horn and Roberto's Crew Rocked my new Doors! They are beautiful and I love them! Professional, Clean, Quick and Full of energy, these guys were great! I would recommend over and over! I will call for my next job too!

All aspects of the window replacement project was conducted in a straight forward, no pressure, courteous and professional manner. Back office staff provided timely updates on delivery and scheduling. Installation was on time, courteous and were very respectful of household cleanliness i.e. carpet runners, drop cloths. Job site was cleaned and debris removed. Installation supervisor was thorough in inspection of completed job and provided comprehensive care, maintenance and warranty information. Overall a great job by all involved. Highly recommended!

We had put off replacing our late 70's home's windows after having a couple of bad experiences with other window installation companies in the area - including one where I had to forcefully tell a salesman to leave my home. But after encountering multiple people who had used Nex-Gen (and all had great experiences), we decided to reach out to them.

Dan, the sales representative we worked with, was polite, friendly, inquisitive about our goals, and worked diligently to educate us and provide us with a couple of different options that he felt were aligned with what we were looking for.

After doing our own research and discussing the project further, we were all-in on replacing all 11 of our home's vinyl windows through Nex-Gen. The pricing was very competitive for the quality of products that they offer, and the reviews were consistently excellent.

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awesome install, seamless from beginning to end

We used Nex-Gen to replace a builder installed poor quality sliding door that had warped over time. From the initial sales visit to the installation, and post installation follow-up, the Nex-Gen team was prompt, professional, and very knowledgeable about what product would work best for us. They also stand by their products and were quick to respond to and resolve an issue we had over a year after installation.

My wife and I received high-quality, friendly, and conscientious service from this family-owned business, beginning with Ted's initial visit, through Brent's critical measurements visit, to Rick and crew's window installation. All appointments were promptly kept. We had eight medium-sized aluminum-frame windows replaced, with the whole process taking less than a day. The installation crew was neat and cleaned up more than once as they worked. They were particularly attentive to the needs of our four cats, which had to be kept isolated and away from empty window openings. The combined warranties from the Marvin company and Nex-Gen appear to be quite comprehensive. When one of the newly installed windows turned up a minor defect in the glass, Rick's immediate response was to inform us he'd write up a warranty service form and get the sash replaced in two to three weeks. We recommend...

Ted did a great job looking at all of our windows and helping us decide which windows to replace this time to match our budget. Ruben and his crew did a great job installing the windows. They kept the rooms clean as they worked and were fast and efficient. Neil Horn did the final inspection and made sure we were happy. Overall, it was a very good experience for us.

We love our new doors. From the beginning having Ted Rajewski come out and talk to us and help us design the perfect doors for our home. The process has been so smooth and professional. The individuals who have done the installations are second to none. The entire staff has been incredible and we are grateful we chose Nex-Gen. The outcome is beautiful! Highly recommend!

Mike did a great job on the repair. Highly recommend.

Neil and Roberto's crew did a great job with the installation on our new Provia door. They were on time, courteous, and communicated throughout the process as well. Justin, the sales consultant, also did a great job. He was upfront, clear, and friendly while going through the design process, getting pricing, and choosing a door company. On top of that, the door came sooner than expected and looks amazing!

We love our new windows and door. The only part we didn’t enjoy was the installation process. The guys left nails on our roof which we asked them to clean up, but noticed they were still there after they left. Also they use dirty floor covers and walked through my home I got a metal splinter from the dirty floor covers which was very difficult to remove. Also the effort they take to protect your belongings is mediocre at best. We had to clean everything because there was dust covering everything once they were finished. Overall, happy with the windows and other interactions, but please do better with your installs.

We replaced our upstairs windows with Marvin 7 years ago. Ted did a great job of showing and explaining the Marvin windows. We are now going to replace all our main level windows, ( 8 windows) with Marvin. We are once again very pleased with Ted and the Nex-Gen staff.

I highly recommend Nex-Gen Window & Doors! We've worked with Ted over three different projects to replace all of our windows and patio door. The Marvin Infinity window is awesome; a huge improvement over our home's original windows! For a quality product, professional service, and great value, Nex-Gen is great!

We put Marvin windows in our prior home and loved them. When we found ourselves needing new windows in our current home we knew we wanted to get a quote from Nex-Gen. We knew it was going to be a costly but necessary venture. We got the quote and ordered the windows in October. The window openings were measured multiple times. By the beginning of December the windows arrived and were expertly installed in 2 1/2 days. (This was over 20 windows plus creating a large sliding door where a window had been.) I can’t say enough good things about Nex-Gen. By the way, Nex-Gen was significantly less costly than Anderson and despite repeated attempts, Pella would never return our calls and e-mails.

After getting several quotes for windows, buying some not-so-great ones from a place who did a TERRIBLE job and doesn’t follow up or provide any customer service, we decided to do a lot more research about windows and companies here in Colorado. After getting more quotes and doing a TON of research on the best windows for the extreme weather, we found Marvin Infinity windows to be the best and NexGen has an unbeatable warranty. It is truly lifetime (there is no asterisk) and can even be transferred if you sell your home. Neil Horn was great in the sales process, he came to the house and listened to our needs and worked within our budget and was very honest about what would be best for us and our home. We also met at the store and looked at all the windows and selected those that would be the best for us. It was so nice to have the hands-on experience. Neil also kept us updated on the...

I recently had 5 windows and 3 sliding glass doors replaced by Nex-gen. I could not be happier with the service and products they provided. Ted came out and offered some changes to an existing kitchen window that turned out beautifully. Every person I worked with was professional, kind and very respectful of my property. I will never hesitate to recommend this company.

We just had a great experience with NextGen replacing 30 very old windows, and would highly recommend this company.

I was impressed with NexGen’s approach of inserting new windows instead of opting for a complete replacement, which ended up saving me money.

They also removed a window, ensuring that the interior was repaired and the siding replaced. The end result was flawless, as if the window had never been there.

I appreciated their attention to detail on every window, as they took the extra effort of painting all the trim, giving the windows a brand new look.

Throughout the entire process, my contacts at NexGen Neil, Shane and Terry, were not only professional but also friendly and nice to talk to. I highly recommend their services.

Dan did exceptional with getting our windows ordered and was very thorough when explaining the details of the project. Robert Herrera was an excellent installer and came with a top-notch crew to complete the window replacement in my home. Also Neil was great and came by twice during the instal to ensure that we received exactly what we paid for. They also went through a final walk through and showed us how the windows operate and explained all the warranty information we needed to know. I would definitely recommend Nex-Gen windows to anyone who is looking for a quality window at a great price, I also would recommend Robert and his crew for any general contracting you need in your home or building. Definitely using them again and requesting this crew by name. Thanks for your hard work and quality installation.

We contacted Nex-Gen Windows and Doors about replacing several of our 37 year old casement windows as well as an entry door in early April 2023. We met with Steve (a Nex-Gen Sales Consultant) about our project. We were very impressed with the quality of the windows and doors, the myriad of options available to us, and the price.

We ordered our windows and door and were amazed how much earlier our purchase arrived than expected. We were able to schedule our installation about a week later.

The Team of Neil, Steve, Dustin, and Arthur arrived early on June 6, 2023, to perform the installation. I was quite surprised that the entire installation was completed by early afternoon.
Neil walked around with us to look at the installation of each window and our door to make sure we were
satisfied and to answer any questions we might have about the features...