The Integrity Brand is Built to Perform.®

Integrity windows and doors are a part of the Marvin Family of brands which means they are back by over 100 years of heritage. Integrity Windows are made with Ultrex®, a pultruded fiberglass we’ve patented that outperforms and outlasts vinyl, roll-form aluminum and other fiberglass composites. Integrity uses Ultrex and their proprietary pultrusion process to manufacture high-demand windows and doors that endure all elements without showing age or wear.

Integrity Windows and Doors from Marvin values and work ethic are forged by the communities where we’re proud to live and work. When you choose Integrity windows and doors, you support a small-town, family-owned and operated company with deep roots in the community; some Marvin employees are fourth-generation, following the family tradition. We share profits with our employees; we support our communities; we treat our dealers and customers fairly and with respect. That’s Integrity.

The Value of Performance

Integrity windows and doors are Built to Perform® with the features and options to fit your unique project. Integrity’s focus is providing high quality products built to your specifications and delivered to your local distributor in an industry-leading 10 days. Integrity uses Ultrex pultruded fiberglass to build long-lasting, beautiful windows and doors backed by our never wavering focus on customer service, and a 20-year warranty on glass seals with a 10-year warranty on manufacturer defects.

Proven Strength

The facts prove it. Ultrex fiberglass is eight times stronger than vinyl and three times stronger than vinyl/wood composites. It resists fading, chalking, peeling and cracking, giving you unparalleled strength and durability. We’re constantly testing Ultrex to prove it’s the toughest window material available.

Built Tough

Integrity windows are Built to Perform® in the face of Mother Nature’s toughest elements. The Ultrex pultruded fiberglass that goes into every Integrity window and door remains stable in extreme temperatures and expands at nearly the same rate as glass, resulting in windows that are strong and true. Fiberglass windows have a 38% longer* useful life expectancy than vinyl.

Energy Efficiency

Integrity windows and doors are more than just tough, they’re also energy efficient. Integrity products meet or exceed federal ENERGY STAR® guidelines. So with Integrity windows and doors, not only will you reduce your environmental impact, but you’ll also see significant savings on your heating and cooling bill over time.