Nex-Gen Windows & Doors

Working with Nex-Gen has been an excellent experience. Ted, our sales rep, was very patient and listened to our needs regarding our replacement windows. He explained in thorough detail the difference in glass types and quality of construction. The price was very competitive and the process of installation could not have gone smoother. Thank you Nex-Gen. Read more >

Had windows put installed by Nexgen and they were awesome. Windows look great. Ted who is our rep is a really nice person. Fixed a problem we had from pet damage in one day. Read more >

We spent a lot of time researching different brands of replacement windows and Marvin Infinity was by far the best and we are very happy with our new windows! Nex-Gen did a great job of keeping us informed during the order/build process; the installers were meticulous and were extremely knowledgeable and friendly. They cleaned up the "mess" (created by the stucco exterior we have) both inside and out and even cleaned the windows for us. I would definitely recommend Nex-Gen and Marvin Windows!!! Read more >

Great service and very competitive price. I had 13 windows replaced and the process couldn't have been smoother. I am very pleased with the end result and for the next project going straight back to them. Read more >

Ted was wonderful to work with and the install team was excellent. Very professional and friendly guys. We did our main floor and loved our new windows so much we called the next week to order/schedule the remainder of the windows in our home. Cleaning will be so easy I am actually looking forward to washing windows now! Read more >

So happy with our new windows throughout our home. Ted was very knowledgeable in helping us determine what type of window would be best. We were very pleased with the installation process led by Rick. Installation team was considerate about not making a mess and cleaning up. We love our new windows and is was great working with the staff at Nex- Gen. They ROCK! Read more >

We chose Nex-Gen to replace a door and window with their Infinity line. We are very pleased so far with the quality of the product. The sales staff and installation crew were very friendly and professional. Read more >

Good people great showroom check them out Brent and your staff are very professional their quality of their work is at the highest standard I would highly recommend them for your next window project Read more >

We chose Next-Gen to replace 13 windows in July. We were extremely happy with the results. We liked their low key sales approach, price (very competitive) and results. Next-Gen was able to exactly match the wood stain color. We also like the screens as they are almost invisible.

We talked to and had bids from other window suppliers. Next-Gen was the best solution for the reasons cited above.

We will use Next-Gen for future window replacements. Read more >

We have looked at the Infinity from Marvin windows three years ago at the Boulder County Home and Garden Show. We met Ted with Nex-Gen Home Exteriors there and were very impressed by him and his product. We had him come out to take a look at our windows and found that Infinity from Marvin windows would be a great fit for our home. We recently had a lot of hail damage and now we are in need of replacing our windows. We called and made an appointment. Ted with Nex-Gen came on time and was very honest and thorough. He is easy to work with as well. Read more >

Good price, good windows, good service means overall I had an awesome experience. The first thing people do when visiting is rave about our new front door. And we are already so much cooler. I know this winter we will be warmer!

Our old windows were all different kinds with all different installations. The guys came and worked with it, making the new windows fit well and helping by adding some strips of wood where needed. Also we couldn't get the blinds down because they were screwed in with a hex screw that was stripped out. The guys got them down and we now have them back up with a phillips screw. We were grateful for their help. I recommend this company! Jacque Mahan (another satisfied customer) Read more >

The professionals at Nex Gen are great to work with! (Ted, Rick, Joe, Alex, Hunter, & Dell). We had our kitchen windows replaced with Infinity by Marvin & love them. They look great (stained to match our wood frames), and work great too. The latches were a bit stiff to start with, but the technician came out & fixed that for us promptly. We're getting our sunroom windows done next. Read more >

n May of 2018 we had Nex-Gen Exteriors install 22 windows in our Mountain log home in Glacier View Meadows in Colorado using the Infinity by Marvin windows and we couldn't be happier with the product, installation and the company spirit. The fit and finish of their product is amazing which was more difficult because of our log home design. This was a large job so we took several quotes from competitors but found their product the best for our needs and at a price that was quite reasonable. From start to finish, Nex-Gen (including Ted, Rick, Brent and Trent) were highly professional and trustworthy and I can easily recommend them to you for your next job - in fact, they are the only ones I would trust. They also have the best warranty and a great company behind them in Marvin. I know of horror stories of wild sales pitches and promises from other window installers (we saw some... Read more >

We just had all of the windows and glass doors in our home replaced by Nex-Gen Exteriors. The entire process from selecting the Marvin Infinity replacements in the showroom, measuring each area for a precise fit, and installing the new windows and doors went wonderfully. Everyone at Nex-Gen was available for questions and promptly answered them. The installation team was very knowledgeable and nice to work with and they did a great job despite the challenging terrain around our home. We highly recommend both Marvin Infinity and the Nex-Gen team. Read more >

We just had a large sliding door installed at our home. We were concerned about possible damage to the hardwood floors and the stucco exterior. Everything went smoothly. The installers were very careful to protect the floor and a couch that was nearby. They spent all day taking out the old door and putting in the new door. It was apparent that they took great care in the whole process. As the new door was thicker than the old door, they modified the hardwood floor and the surrounding wall. You would never know as everything was professionally finished. They cleaned up all of the mess and even washed the new door window. They spent time explaining how this new door would keep rain from coming in (unlike our old door that leaked badly). The showed us how to operate the new door as it is quite different from our old one. The Marvin product is much sturdier and glides well in... Read more >

The Nex-Gen showroom was a great way to envision which window option would be best for our home. We did all 39 windows in our home of 24 yrs. They look great! All customer service was excellent and the window crew great to work with, very knowledgeable (even made some quick fixes to a sticking or not shutting door for us) after they got tired of dealing with them! They were very careful of garden plants and both the inside and outside look wonderful! We are very pleased and look forward to many years enjoying our new windows! Read more >

The quality of the doors from this company (Pro Via) are unmatched. Jason Goldsmith the salesperson was amazing - very precise in his information, patient, helpful and going to all lengths to make sure that we were taken care of in every way. He was prompt in responding to questions, wonderful communication and very personal. He was confident that we would love these doors and we do. My husband and I had spent 3 1/2 months looking at Pella doors, and every other door in between with various companies, but nothing seemed to be a very good quality or at a reasonable cost. Hands down we prefer the Pro Via over Pella doors including the quality and the incredible warranty. The crew that installed the doors were very experienced and worked extremely well with our stucco home and brand new wood floors - we were very impressed with their experience. They put in 3 doors in one day with... Read more >

Excellent service and quality product. Ted, Brent and Rick were an amazing team. They were courteous, knowlegable, and did a truly professional job from start to finish. Our installer, Rick arrived on time, got right to work, and kept us updated on the progress of the installation throughout the day. He cleaned up at the end of the day and left no mess behind. 5 star product, 5 star service. Read more >

It has been five years since I had three windows replaced. They turned out beautifully matching the wood decor in the house. Ted was wonderfully helpful & attentive. I have been very happy with them and am hoping to replace two more & a sliding bedroom door soon. Thank you Nex-gen! Read more >

These craftsmen (Next-Gen Exteriors) came highly recommended by a neighbor. The Next-Gen installers and finishers were meticulous in their work and a pleasure to deal with throughout the process. Clean, organized and efficient teams. Our thanks to Ted, Brent and their installation/finisher teams. Read more >

Wow! What a great team of people. Jason led us through the process of replacing 18 windows on our 25 year old home. We knew with where we live that we didn’t want vinyl or wood windows due to the extreme weather conditions so we opted to check out Marvin windows. We couldn’t be happier. The team that measured and installed were professional and courteous. We look forward to working with Next-Gen in the future! Read more >

I called NexGen for a quote for a new storm/security door. The sales consultant, Ted arrived in a timely manner. After looking at our current door, he said we really didn't need a new door. Our door does need to be serviced. Nice to have an honest company to call on. Thanks Ted. Read more >

LOVE our new windows! Our room is much warmer (when it's cold outside) than it was before. And the guys who did the installation were really good - professional, courteous, and they knew exactly what they were doing. Very happy overall and would highly recommend Next-Gen for new windows. Read more >

The vinyl windows in our townhouse were 20 years old and showing signs of their age. We contacted several companies for bids. Some of the presentations were really long. We really appreciated Ted's selling style of letting the product speak for itself. He didn't waste our time. His pitch was informative and very low pressure. I'm so happy we chose to go with Brent and his team. I dreaded the installation process and the cleanup afterwards. My husband was home when the windows were installed. I couldn't believe it when I got home from work and the windows were in and there was no mess! I would not have known the installers had come if it weren't for our beautiful new windows. The company is very responsive and workmanship was outstanding. I highly recommend Nex-Gen Home Exteriors for window replacements! Read more >

The vinyl windows in our townhouse were 20 years old and showing signs of their age. We contacted several companies for bids. Some of the presentations were really long. We really appreciated Ted's selling style of letting the product speak for itself. He didn't waste our time. His pitch was informative and very low pressure. I'm so happy we chose to go with Brent and his team. I dreaded the installation process and the cleanup afterwards. My husband was home when the windows were installed. I couldn't believe it when I got home from work and the windows were in and there was no mess! I would not have known the installers had come if it weren't for our beautiful new windows. The company is very responsive and workmanship was outstanding. I highly recommend Nex-Gen Home Exteriors for window replacements! Read more >