Fiberglass and wood replacement windows to fit any style and budget.

Find Windows


Entry, sliding, French and many other replacement doors.

Find Doors


Wide selection of insulated and lap siding for any budget and decor.

Find Siding

Serving Northern Colorado

Fort Collins to Denver, Estes Park to Greeley.

With over 35 years of experience in the industry Nex-Gen prides itself on both quality of service and product. As our customer we pledge to inform, guide, and empower you to succeed in your goals by making the best possible choices for your home and family.

Visit Our Loveland Showroom
A local company, backed by a national firm. Improving your home for life.

Better Products »

  • Infinity by Marvin Replacement Doors & Windows
  • ProVia Replacement Doors

Better Service »

  • Locally Owned & Operated for Over 35 Years
  • Licensed, Insured and Bonded

Better Warranty »

  • Lifetime Installation guarantee
  • Value Beyond the Product

Amazing Windows & Doors

"We recently had Infinity windows installed in our home (14 windows and 1 patio door). The temperature in our home now is much more consistent and the home is also much more quiet than before. With the fall temperatures getting cooler and lots more wind, our thermostat has been set lower than in the past and we have not heard the wind or traffic noises like we did before..."

Deb & Rich Meyer

Pin It on Pinterest

Share This