Why Marvin Ultrex Fiberglass Windows Are Superior to Vinyl

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Choosing windows for a construction project can be challenging, even for seasoned builders and contractors. With constant technological advancements, there are now many materials to choose from, each with varying levels of durability, energy efficiency, and aesthetic appeal. While vinyl has dominated the market for years, a new, superior material has been introduced to the industry- Marvin Ultrex Fiberglass. In this article, we'll explore why Marvin Ultrex Fiberglass Windows is the material of choice for professionals who want to create a durable, long-lasting, and energy-efficient home.

Marvin Replacement Double Hung Window with a close up of Ultrex fiberglass



Marvin Ultrex Fiberglass offers superior durability than any other window and patio door materials. Ultrex fiberglass is 8x stronger than vinyl and 3x stronger than Fibrex. This makes Ultrex highly resistant to damage from hail, wind, and other harsh weather conditions. Ultrex is resistant to leaks, seal failures, and stress cracks, providing homeowners with greater peace of mind. It will not melt or lose its shape, even when exposed to extreme temperatures. It expands 87% less than vinyl and 75% less than Fibrex, making it remarkably stable when temperatures fluctuate.


Energy Efficiency

Marvin Ultrex Fiberglass is specifically designed to resist warping and weathering for long-lasting durability. It is 5,000x less conductive than aluminum, providing superior energy efficiency for homes. Its low conductivity enables it to retain more heat in winter and stay cooler in summer than other materials. This ultimately saves homeowners energy costs over the long term and helps to create a more comfortable home environment all year round.

energy efficient windows

Strength and Stability

Marvin Ultrex Fiberglass is renowned for its superior strength and stability. Its proprietary Acrylic Finish is three times thicker than other comparable options, providing unparalleled resistance to scratches, fading, chalking, chipping, denting, and peeling. The incredible strength of Ultrex allows for narrower frames, resulting in better views for homeowners. It also has outstanding fade resistance, maintaining its initial appearance for years.


Customizable Options

Marvin Ultrex Fiberglass offers customizable windows and patio doors to fit any home design. Ultrex Fiberglass is available in an array of colors and finishes, making it easy to match any existing décor. The material can be easily shaped and molded to fit any room, offering an unparalleled level of flexibility for builders.


When it comes to materials for windows and patio doors, Marvin Ultrex Fiberglass is the clear winner. It provides superior durability, energy efficiency, strength, and stability, making it the premium choice. With the added benefit of customizable options, it combines functionality with aesthetics, providing homeowners with a practical and attractive solution. Professionals can rest assured that by choosing Ultrex, they are delivering quality, durability, and energy efficiency to their clients.

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