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Milgard Fiberglass Replacement Windows

There are so many cutting-edge window replacements to choose from. And with manufacturers’ innovations in efficiency, style and material development, the options are only expanding. Milgard offers two lines of replacement windows that marry the traditional styles of old-fashioned, all-wood windows with the efficiency and design of modern technology. The end result? Milgard’s Fiberglass Ultra and WoodClad series windows.

Some serious fiberglass perks:

  • Extreme durability and strength
  • Water, cold and heat-resistant
  • Protects against salt air and UV-rays
  • Insect-repellent
  • Window trim materials expand & contract with the glass, causing less stress on the window components
  • Fiberglass frames will not bend, peel, crack, warp or stick

Plus, Milgard warranties these two lines against manufacturer’s defects and glass breakage.


The Milgard Ultra line is unique in that it offers fiberglass windows that give the appearance of painted wood. You can choose a window trim color from the factory chart, or request it uncolored and paint the trim yourself. That option may better complement your home’s exterior finish.

The fiberglass has a more traditional look than vinyl, yet is more durable and requires less maintenance than real wood.


The WoodClad series features an even more realistic all-wood appearance with the benefits of fiberglass. While the window exteriors are also built from fiberglass that can be factory-colored or painted on-site, the interior trims, however, are made with real wood. The interiors can be constructed from furniture-grade natural Douglas Fir or mahogany wood. You have the choice of finish with any stain you’d like or a simple sealant for ultimate natural beauty.

Both Milgard fiberglass series offer a wide selection of designs, shapes and sizes and can be customized to fit the specifications of your window openings - without adding to the cost or lead time of your special order of replacement windows.

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