Signature Windows > Windows > Window Brands > Integrity

Integrity. Designed to Perform, Built to Last.

Marvin’s Integrity line boasts the best in fiberglass windows and doors, which means you don’t have to sacrifice beauty and style for performance and efficiency. And, with plenty of styles suitable for any budget, Integrity is a hands-down Colorado favorite.

A part of the Marvin family of brands since the early 90s, Integrity Windows upholds the Marvin brand standard of exceptional quality and performance. Through innovation and a carefully selected menu of options, Integrity Windows provide a lower price point to expand the range of homes that can enjoy the quality of Marvin products.

The main difference between the two brands is that while the Integrity line provides new and replacement windows designed to fit most modern standard-size window openings, Marvin Windows can be completely customizable.

Integrity Window Advantages

Fiercely proud of their quality, Integrity Windows are built with Ultrex, a pultruded fiberglass with a patented acrylic capping that will outperform and outlast vinyl, roll-form aluminum and other fiberglass composites. The Ultrex finish provides exterior color options that pass the same fading, chalking, and scratch resistance as Marvin’s flagship aluminum-clad window line. In addition, Integrity sources their glass from the same manufacturer to offer owners the same peace of mind that comes with Marvin’s measured seal-failure rate of just 2 seal failures in 1,000 over 20 years.

A home with Integrity Windows retains every bit of the aesthetic appeal as one with Marvin windows, as the same attention to fit and finish is paid to both brands by the production team. Integrity windows are designed to be easily installed and operated with virtually no maintenance to the homeowner, providing years of worry-free performance and operability.


Integrity windows will outlast and outperform any vinyl, roll-form aluminum, or inferior window composites.

Refreshingly Affordable

All Integrity windows are made with durable Ultrex® Fiberglass -- innovative and wallet-friendly.

Innovative Style

Each Integrity window is customized to suit your specific needs, resulting in beautiful design and exceptional function.


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