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Fiberglass Windows
Fiberglass stands up to harsh conditions and requires almost zero maintenance. It doesn’t expand or contract with temperature shifts, helping your windows to resist leaks and seal failures for years to come. Put our decades of fiberglass research and development to work for you with our Modern, Vivid, Elevate, and Essential windows, which feature either High-Density Fiberglass or our proprietary Ultrex® material.
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Fiberglass windows have exceptional thermal efficiency, strength, and durability. But there’s a lot more to know about how we develop this remarkable material, and how well it compares to other resources like vinyl and rolled aluminum.
Photo Gallery
Explore our gallery of photos featuring Marvin products and imagine the possibilities.