Every Marvin Window and Door is made to order, one at a time. An unparalleled value in the market, Marvin offers craftsman-quality construction, energy-efficient technology and the industry’s most extensive selection of shapes, styles, sizes and options.
Integrity's windows and doors are made with Ultrex® Fiberglass, an innovative material created 20 years ago. For two decades now, Ultrex has outlasted and outperformed the competition on virtually every measurable scale.
Infinity Ultrex fiberglass replacement windows and patio doors are designed to replicate the look of traditional wood windows while providing modern features and low-maintenance, yet long-lasting performance.
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Sliding Patio
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When you partner with Marvin on your next project—whether that be a remodel, replacement, new construction, or even the creation of sustainable building—you can be sure you will be getting the guidance and expertise necessary to make any design complete. Tell us a few things about your project, and Marvin will work with local dealers to bring your ideas to life.
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We gathered some helpful resources to help answer your immediate questions and provide solutions. From manuals to maintenance, and installation instructions to energy data, there’s a wealth of information right here.
Ultrex fiberglass - a pultruded fiberglass material so strong and durable it is superior to other window materials. Best of all, it makes Infinity products virtually maintenance free.
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Integrity windows and doors are made with Ultrex®, a pultruded fiberglass we’ve patented that outperforms and outlasts vinyl, roll-form aluminum and other fiberglass composites. We use Ultrex and our proprietary pultrusion process to manufacture high-demand windows and doors that endure all elements without showing age or wear. Our 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 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. Why Ultrex?
* “Life cycle assessment of windows for the North American residential market: Case Study” by the University of British Columbia Scandinavian Journal of Forest Research, 2008.
Our 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. Why Ultrex?
Ultrex® fiberglass leads the industry in third party finish ratings. Ultrex, with its patented finish, is the first and only fiberglass finish to be verified to any of AAMA’s 624-10 finish specification for fiber reinforced thermoset profiles (fiberglass). This means you can count on Ultrex to resist fading, chalking, cracking, and peeling to keep your home looking great for years to come. Learn More
Our 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. Learn More
Integrity offers a variety of options that can enhance the look of both traditional and contemporary design. Our All Ultrex and Wood-Ultrex product lines feature the strength of Ultrex pultruded fiberglass and offer a complete line of popular styles and design options, including divided lites and exterior trim. Explore Options
We are dedicated to leading the way in innovation and never forget the cornerstones of our business. We are highly selective in choosing our business partners—including independently-owned dealers and distributors—to ensure our customers have the best experience possible. Visit Our Resource Center
Integrity windows and doors are Built to Perform® with the features and options to fit your unique project. Our focus is providing high quality products built to your specifications and delivered to your local distributor in an industry-leading 10 days. We use 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.
“At Integrity from Marvin Windows and Doors, we didn’t join the fiberglass windows and doors industry – we pioneered it. In 1994, Integrity was born from The Marvin Companies’ century-long heritage of service, craftsmanship and quality with a focus on all-out performance.” – Susan Marvin
Integrity's windows and doors are made with Ultrex Fiberglass, an innovative material created over 20 years ago. For two decades now, Ultrex has outlasted and outperformed the competition on virtually every measurable scale.
With a strong Ultrex Fiberglass exterior paired with a rich wood interior, our Wood-Ultrex has both strength and beauty.
Constructed with Ultrex from the inside out, our All Ultrex offers outstanding strength and durability.
When shopping for windows, it’s important to focus on the four main categories: materials, efficiency, design, and value. For additional help, watch our video series Decide with the Diamond, hosted by Lou Manfredini.
We are always here to help you figure out which window or door is best for you. Find an independent dealer partner near you, and start getting answers to your questions.
Honors the exceptional work of licensed builders, remodelers and architects who use Integrity Windows and Doors.
More and more commercial contractors are turning to Integrity to meet their needs for durable, customizable, low-maintenance Ultrex fiberglass windows and doors.