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Infinity From Marvin Glider Windows


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Glider Window Installation in The Fort Collins Area

The Infinity Glider is the perfect option if your existing glider
refuses to “slide” open or you have a space where a swinging
sash would get in the way.

Whether installed in your family room or on a four-season
porch, the Infinity Glider’s smooth sash rollers let you easily
open it to let a breeze into your home. Our Ultrex ® frame
seals tightly against air and water infiltration — making it
both durable and energy efficient.

Interested in glider windows? Get started with a free quote now! Our experts offer skilled glider window installation and replacement in Loveland, Fort Collins, Greely, and beyond!

Window Cleaning Made Easy

Simply slide the sash open, operate the tilt latch, remove, clean and reinsert.


According to HomeAdvisor, 25% of the costs for heating and cooling your home comes from the energy lost through your windows.

Carefully considering which type of window is right for your Fort Collins area home could save you thousands of dollars in energy costs, while increasing the resale value of your home.

Also, independent market studies have noted that 65% of service related issues to prematurely failed windows are related to improper installation. This is due to:

  • short cuts during the installation of new or replacement windows
  • low-cost faulty sealants
  • improper flashing methods

You can count on Nex-Gen Windows & Doors for superior glider window services in the Fort Collins area. Contact us today to speak with an expert or to schedule glider window services in Fort Collins, Cheyenne, Lafayette, the surrounding area!

infinity from marvin replacement windows nex-gen windows and doors

What are the best replacement windows for my home?

We’re making it easier for you to buy replacement windows and doors by sharing what to expect during your project. Learn more about how you can find the best window for your home.


1. Expert Consultation

A Nex-Gen windows and doors expert will provide a complete consultation to determine your specific needs — including climate considerations and other factors. They will answer all your questions and provide a detailed, custom project quote based on your specifications.

2. A Perfect Fit

We’ll review your order, measure your openings and verify your installation needs. Your windows will then be built to your exact needs and measurements.

3. Seamless Installation

We’ll remove and dispose of your old windows, and replace them with your custom Infinity windows.

4. Built for Life®

From our Limited Lifetime Warranty to unparalleled customer service, we go above and beyond to ensure your windows provide a lifetime of optimal performance.


At Nex-Gen we’re changing the way Window & Door replacement has been done in the past. Our Expert Staff will provide industry leading solutions for your home improvement needs. The right product for your budget and desired functionality. Our promise is to provide a low pressure, educative consultation while allowing you to be the judge to make the right decision for your homes’s needs.

  • 1

    Let’s Begin

    We start with a phone call to collect information about your home, your replacement needs, and your goals. Every project is unique; we learn as much as we can upfront to ensure a successful remodel experience.

  • 2


    We visit your home to get a first-hand look at the project and to familiarize you with our process. We discuss products and innovative solutions, and provide a transparent cost vs. value analysis and detailed proposal.

  • 3


    Our Elite Window Experts take meticulous measurements to ensure a smooth installation. Accurate window measurements also maximize energy efficiency and protect the aesthetics of your home.

  • 4


    You stay informed with periodic updates via phone, email or text. Scheduling changes are sometimes unavoidable due to the manufacturer’s date changes or inclement weather. We keep you posted in real time.

  • 5


    Our installers come and go with minimal disruption to your routine. No need to leave your home; most installations are completed in 1-2 days. Our crew members receive special training and pass background checks.

  • 6


    Upon completion, the lead installation tech does a walk-through final inspection. He provides operating instructions for your new windows and doors and reviews the warranty information.

  • 7

    Let Us Know

    We ask that you complete a survey as the final step in our process. Collecting feedback about your experience keeps us on our toes. If we didn’t meet your expectations, we want the opportunity to make it right.


We just replaced 25 windows and a door in our home. The sales staff and installers were courteous, professional, and a pleasure to work with. Rick and his crew worked quickly and kept the house clean. We were kept informed every step of the way and they delivered as promised. Our Marvin Infinity windows are beautiful and we immediately noticed a difference in the amount of heat and glare reduction as our house faces west. Really can’t say enough about this company and it’s staff!

Tahni C.

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infinity from marvin replacement windows nex-gen windows and doors


better business bureau accredited business nex-gen windows and doors
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“Serving Northern Colorado From Fort Collins to Denver, Estes Park to Greeley – We’re here for you.”

Improving your home, Windows, Doors, Siding Installation