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Integrity Fiberglass Windows and Doors

Durability & superior finish in fiberglass windows & doors

A material 8x stronger than vinyl and 3x stronger than vinyl/wood composites. Those are just a few stats that show how the Ultrex fiberglass material found in Integrity from Marvin Windows and Doors outperforms all others!

Recognized as one of the best products on the market today, Integrity windows and doors are used in applications with demanding needs. Beauty, structural integrity, historic replication, and extremely low maintenance finishes are just a few qualities that architects, builders, remodelers, and homeowners love from the Ultrex product line. With Integrity, you’ll enjoy:

  • An acrylic finish that resists chalking, peeling, and cracking
  • Minimal expansion and contraction, making Integrity products resistant to leaks, seal failures, and stress cracks
  • The strength of Ultrex fiberglass provides structural integrity for large openings
  • Rot-resistant, leak-proof, and corrosion-proof materials

Whether it’s rich Wood-Ultrex windows gracing an Elm Grove colonial, an expansive All Ultrex sliding patio door in a Brookfield office building, or strong fiberglass double hung windows in a historic loft in Downtown Milwaukee, Integrity from Marvin provides a solution. It’s no wonder Weather-Tek has installed thousands of Integrity windows and doors across Southeast Wisconsin, and it’s no wonder Integrity Windows and Doors by Marvin is one of our leading product lines.

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Classic Customizations Combined with Expert Engineering

What can you expect from Integrity Windows and Doors?

If you are looking for a superior low maintenance product paired with outstanding hardware performance, Integrity is a perfect choice. Choose All Ultrex windows for the same finish, both inside and out, or opt for Integrity’s Wood-Ultrex product line and enjoy the beauty of wood on the interior of your home with a durable fiberglass exterior. The bare wood finish can be stained to match your interior for consistency in style and design. Or, a factory applied white pre-finish could be used to reduce labor and finishing time at the job site.

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Featured products from Integrity

Featuring all-new product displays in 2018, Weather-Tek’s Window & Door Design Gallery offers an extensive selection of Integrity windows and doors. Test out the extruded fiberglass product for yourself and explore a variety of selection options while you browse these featured products. As one of the strongest materials on the marketplace today, Integrity windows and doors provide big possibilities for big window openings. Find the perfect solution for your replacement window project!

Integrity Wood-Ultrex Insert Replacement Double Hung

Integrity Wood-Ultrex Insert Replacement Double Hung

The frame-in-frame design of this window is built for precision in your unique opening, allowing for a clean replacement without disturbing the existing trim on your home.
Integrity Wood-Ultrex Awning

Integrity Wood-Ultrex Awning

Versatile and strong, the awning window from Integrity features dual locking points, a scissor arm operation, and Ultrex exterior that withstands the harsh Wisconsin elements. Perfect on its own or paired with a stationary pane!
Integrity All Ultrex Sliding Patio Door

Integrity All Ultrex Sliding Patio Door

The strength of All Ultrex in this door provides contemporary sight lines while resisting the sagging and misalignment issues that many vinyl doors are prone too. That means smooth operation for years and years to come!
Integrity Wood-Ultrex Round Top Window

Integrity Wood-Ultrex Round Top Window

Add light and flair to any space. Round top windows are available in quarter-round, half-round, and elliptical designs that pair perfectly with the clean lines of the Integrity family of products.

Integrity All Ultrex Double Hung

With tilt-in, easy cleaning top and bottom sashes, and a nearly maintenance-free finish, the Integrity All Ultrex double hung window is a great choice for convenient cleaning!

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Integrity Windows and Doors family

Founded on values that stand the test of time: pride, community, handwork, and integrity. Marvin Windows and Doors of Warroad, Minnesota took their work a step further with the line of fiberglass Integrity products in 1994.

Their definition of integrity? Values that don’t budge an inch no matter how much the rest of the world compromises, a commitment solving problems, not passing them off to the next person, and a product tested over time, passed down for generations. That’s Marvin Windows and Doors.

Integrity windows and doors are like the value of integrity itself. They are able to stand up to just about anything, strong and true, just like the people who built them.

As a privately held, generations-old company, Marvin Windows and Doors takes their duty to sustainable operations and corporate social responsibility very seriously. It’s a commitment that earned them the coveted American Business Ethics “Most Ethical Large Company In America” Award. If that’s not a mark of integrity, we don’t know what is!

The Integrity & Weather-Tek Relationship

How do you take an already strong relationship and multiply its effect tremendously? By extending the Weather-Tek and Marvin relationship to the Integrity line of products.

For decades, we’ve partnered with Marvin to bring exceptional windows and doors to our customers in Southeast Wisconsin. As a Marvin Authorized Installing Retailer, we can actually use the properties of fiberglass as a metaphor for our relationship with this partner:

  • Strength – Stronger than steel. That’s how Ultrex performs and it parallels our relationship with the Marvin family of brands.
  • Stability – Resistance to bending and warping with heat and cold. We’ve worked with Marvin through several building recessions, holding the relationship strong.
  • High Heat Resistance – Things can heat up without concern. When facing a complex project, Marvin partners with us to design products that ensure construction and installation is a success.
  • Efficiency – Swift manufacturing and shipping. Marvin’s fast, efficient delivery of Integrity products keeps projects moving without delay.

Those are just a few examples of the strength and beauty found in Marvin and Weather-Tek’s work together.

Replacement Window & Door Product Catalogs

Collection of Integrity Product Resources

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