Infinity from Marvin Window Installation in Fort Collins


In independent market studies, they 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 windows, low-cost faulty sealants and improper flashing methods. There is something to be said for doing a job right the first time, and being able to put your name on it. Nex-Gen strives for quality over quantity and is constantly raising the bar in the window replacement We live by the code: A product is only as good as the Installation behind it.



Up to 2 Hrs.

Product Consultation

Personalized consultation to determine the window and door products specifically for your home. We advise, but we want our customers to make the decision that’s best for their family.

7 Days

Critical Measure

Our company will contact you within 7 business days of signing the contract. A certified critical measure technician will ensure each window and door is custom built to the exact specs of each opening.

4-6 Weeks

Custom Product Manufacture

The Infinity from Marvin product is a custom built window and door solution. Due to this measure of quality, each window and door takes up to 6 weeks to build. Truly a product built for you and your home.

Upon Delivery

Delivery and Contact

Our certified installation masters will contact you when your products are delivered. They will coordinate dates and times with you based on your project.

Based on Order


The installers arrive with all necessary equipment to complete your job to the highest of standards. The completion time will be based on the size and extent of your project.


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!

Lyn S.


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 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

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.

Improving your home, protecting your investment