Nex-Gen Windows & Doors

A major hailstorm damaged all the windows in our home so we needed our wood casement windows replaced. We were dreading this major undertaking. But our experience was amazingly pleasant with NexGen from beginning to the end. Everyone was very knowledgeable and helpful and the installers were professional, polite, and very thoughtful in every way. Our Marvin Infinity Windows have passed the test in every way. We highly recommend NexGen!

We got half of our windows done a few years back and they are all very personable and efficient. Marvin windows are great quality. We are hiring them again for a few more. Ted is wonderful!

Friendly staff & great windows

I saw the great reviews this company had when I was first looking for new windows. Ted did not disappoint in explaining the product, and he gave me a good price. I highly recommend this company to anybody looking for windows.

We had to replace 3 very old windows in our home and chose Nex-Gen based on recommendation. The Nex-Gen team was very friendly, professional, and easy to work with. The windows are excellent quality and they took care to make sure that the job was done right.

We visited the Nex-Gen showroom in Fort Collins. The salesman was helpful and informative but not pushy. We had another salesman visit us at home and give us some ideas. He asked for our business but was not pushy. He understood that I was dealing with the death of my father, and also understood that we were in the middle of refinancing, and he and his supervisor worked with us in a patient and polite manner. When the windows arrived the efficient and polite crew did the installation in 2 days. A week later two painters arrived and carefully painted the inside framework for us. During a recent severe cold spell we noticed an improvement in how our house retains heat better and our north-facing windows no longer are cold. We also noticed that we don't hear as much vehicle noise as we did before. We are happy customers of Nex-Gen Windows in Fort Collins.

From the beginning of contacting Nex-Gen to finish of the project the process was smooth and without hassle. We had considered other brands but the Marvin windows with the fiberglass technology were the most superior and by far the best value from what we were quoted from other companies. Our window installers and finishers were professional and trustworthy. Our house is now more quiet, comfortable and safe! Ted and his team are great.

We had our home resided and installed new storm door and main entry door. From 1st appointment for estimate we were treated with respect and felt no pressure to to make a quick decision or pressure to buy. We learned a lot from Ted our salesman who saved us several thousand dollars by explaining that not everything had to be replaced. When we made our final decision and placed our order everything moved along very smoothly. Brent, the owner of the company was responsive to our questions and has a wonderful office staff to efficiently handle anything that might come up. Questions and calls were returned promptly. Delivery and installers we equally efficient. They worked hard only stopped for a short lunch break and worked from sun up until sundown. When the job was finished Brent and his foreman came out to do a walk around to be sure everything was done to our complete satisfaction....

We love the doors they installed! They look so elegant. I smile every time I walk by them. This was somewhat complicated as they had to shorten a 6 foot window above our front door. It looks better now then ever before. We received wonderful advice and help from Ted. I will definitely recommend this company to my friends and neighbors.

This experience was literally like a breath of fresh air for us. Every employee involved was professional, courteous, and left us with a job well done. Wendy kept in touch about times and dates. James and Dave installed 13 windows in frigid weather in just 2 days. They were respectful, neat, clean and did a perfect job. Clark checked in during the installation process, answered questions and then followed up to inspect their work the very next day after all the windows were in. We are also thankful to Steve for his expertise when he sold us on these windows and this company. We highly recommend these folks. You won't be disappointed. What a great company, genuine people and an excellent window product!

We have a fixer upper and had a few different brands of windows and doors installed. We did it in phases. We had some new vinyl windows installed and later a few Infinity from Marvin windows installed. The difference between the vinyl and Infinity is incredible. We later had an Infinity patio door installed. The Infinity quality is like no other! The noise reduction and temperature difference is very noticeable. They provide a bigger view and glide like butter! We will only go with Nex-Gen and Infinity from here on out! In addition, Nex-Gen’s team is wonderful. They truly care about the customer and go above a beyond to make sure the job is done right!

I really cant say enough about the entire experience. Especially in these most recent time's we are all going through.
Starting with Hunter taking my initial call, then Ted coming out to the house and helping with my decision making. Windy keeping me in the loop during the manufacturing process and finally, exactly on time meeting the installation crew, Ishwa and Drew.
Everyone treated me as if we had know each other for years. The job is A++ and they all let it be known that they will be here for me in the future when and if needed.
Thank you all for reminding me that the " American work Ethic " is alive and well on our Front Range.

Superior service, installation, and product. Nex-Gen did a full window replacement on our two story home in Fort Collins on October 2020. Two months later, everything is still perfect about them. We chose many different window types for the house (double hung, awning, casement, half moon, sliders, oriels) and changed our minds several times through the design process including adding two new window openings. The thing that impressed us most about Nex-Gen was their patience through our design changes and that they ordered everything exactly right in the end. We met with 5 other window replacement companies to get bids. We ended up going with Nex-Gen due to their full frame installation (vs pocket) and the fiber glass Marvin windows having a slimmer profile and better heat tolerance for direct sunlight. We were really glad we went with Nex-Gen once the design process started...

Ted and the installers provided windows for us in our bedroom two years ago and we were so impressed with the quality of the windows and installation. Now two years later, Susie and I loved the quietness, the warmth in the wintertime, insulation from heat in summer and ease of cleaning of the windows that they installed. We are looking forward to having them now install windows in our dining room and a new French Door in our MBR this winter. Just a great company with consistently good people. Pete & Susie Straub, Loveland, CO

Had a great experience, love the windows.

Nex Gen replaced 6 windows in our 30 year old house and we couldn't be happier. Thier communication was top notch and they delivered when they said they would. The installers were courteous and professional and did a great job. I am an extremely picky person but can honestly say I found absolutely nothing wrong with their quality of work. Once finished they cleaned up so well you couldn't even tell they had been here other than seeing new windows. The painters also did an excellent job painting the new interior and exterior trims and cleaning up. If you are looking for quality windows, not big box store windows, Nex Gen is the way to go.

Great company, great service, great pricing. They've replaced 11 windows over the last 2 years, we are very happy with Nex-Gen windows!

We had our upstairs windows replaced by NextGen Windows and Doors and now we’re having some downstairs windows and slider replaced. Very pleased with quality and professionalism of all so we wouldn’t consider using anyone else. Thanks to Ted and His team and Infinity from Marvin fiberglass windows.

We had such an spectacular experience with Nex-Gen with our Window replacement a couple years ago that we didn't bother looking elsewhere when it came time to replace our back door. Just like before, our sales rep was informative, polite and friendly, plus the price was right in line with what we expected. Thanks again Nex-Gen for doing a great job and making everything amazingly simple and easy!

I really liked how they follow up with their beautiful product. Windows and doors work WELL and keeps my home more quiet. Ted and his team continue to check to make sure I have been happy with their work. Thank you for this service of the Infinity from Marvin Windows and Doors!

This company is fantastic! The quality is awesome and truly worth the price! Love that it's locally owned - and the owner even came out to check on the project! Ish and Drew are the best install crew, they made sure everything was 100% to my liking and beyond friendly/professional! They replaced every window in our house and couldn't be more pleased! Thank you Ish and Drew!

We have had our infinity by Marvin windows now since March of 2020, and I love the professional look of the windows. They were very responsive and friendly through the entire process, the windows had cut our energy bill almost in half. The price of the windows are well worth what you get.

First - the infinity fiberglass product is beautiful! Our windows and sliding door are stunning!
Second - the product itself is outstanding. We happen to have them installed during the summer where we were in 95+ days and then the random snow fall and down to 37 - our A/C barely kicked on during the hot days and our house warmed up with a quickness when it was cold and snowy outside! Plus - our house is SO QUIET now - completely noticeable quiet!
Finally and most importantly - the level of service has been outstanding! From Ted in sales who took the time to get to know us and our needs and checked in on us the whole time...to Ish and Drew who spent the week with us installing - answering our countless questions, double checking the work, and becoming like family! They are talented, meticulous, and fun!
Thanks Nex-Gen team - we are already figuring out our next...

Could ask for a be better team . These guys are great I recommend them to all my friends thanks guys

As a single senior who needed new windows for a 16-year-old home, this investment needed to increase the value of my home, deliver a quality product, decrease the drain on my HVAC, and present trusted professionals who would look out for my major investment. NextGen exceeded my hopes and needs. From the first visit with Ted through installation to final inspection, I had the BEST experience in my lifetime of homeownership.

This home now distinguishes itself from comparable homes in my neighborhood with Marvin windows alone. My neighbors, including a realtor, attest to increased appeal and home value. Second, the superb quality of windows leaves me secure in a home so quiet I can no longer hear wind, rain, traffic, and neighbors. I chose rain glass in the bedroom and foyer to ensure privacy and yet maximum light. The windows are more substantial than any I've seen on the...

We had windows replaced by Nex-Gen. The windows operate very smoothly and block most of the heat from the sun. The installers, Iswad and Drew were very conscientious. They put coverings on the floor and furniture. They kept everything nice and tidy as they worked and even vacuumed when they were done.

I had a very pleasant experience with this company. There was lots of communication and they patiently answered all of my questions. However, they didn't warn me about how much dust there would be. I would have done much more prep ahead of time than they recommend: remove all fabrics from the rooms (rugs, bedding, towels, etc). The installation crew even put my blinds back up. Very good quality windows. They fixed all of my water damage.

Great products and service. The entire process from sales, to installation and follow up was very professional. Great people to work with.