The Ultra™ Series, as the name implies, is the ultimate window frame material for new construction and fiberglass replacement windows. Because it's made of glass fibers, it expands and contracts at the same rate as the insulated glass it holds. This puts less stress on the seals, reduces the chance for seal failure and results in a clear, fog-free window that lasts for years and years.
Milgard® Ultra™ Series fiberglass windows combine a traditional wood-frame profile with the strength, stability and low maintenance of fiberglass. Our fiberglass windows withstand the harsher sides of Mother Nature like no other window, yet look like traditional painted wood windows. In fact, you can choose any of our factory-painted exterior colors or paint the exterior yourself. And for multi-unit projects, Milgard offers the option of custom colors applied at the factory. Milgard fiberglass windows are custom made to your home's exact specifications at no extra charge or extended lead time. You can customize them with our wide selection of hardware finishes and virtually endless grid options. All Milgard fiberglass windows are covered by our Full Lifetime Warranty with Glass Breakage.
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- Single Hung Fiberglass Windows – Traditional in appearance, Milgard's single hung fiberglass windows slide vertically, reminiscent of old-style sash windows. Open without using any exterior or interior space. Great for any room.
- Double Hung Fiberglass Windows – Milgard double hung fiberglass windows offer all the elegance of years gone by. Both top and bottom sashes open—use only top sash to keep children and pets safe. Sashes tilt inward for easy cleaning.
- Horizontal Sliding Fiberglass Windows – Open without using any exterior or interior space. Milgard horizontal sliding fiberglass windows are popular for satisfying bedroom egress requirements, as an easy opening window over kitchen counters and sinks and for providing a contemporary look. Open without using any exterior or interior space.
- Picture Fiberglass Windows – Maximize your view in the living room, dining room and master bedroom with Milgard picture fiberglass windows. Combine with other style windows for ventilation.
- Radius Fiberglass Windows – Milgard radius fiberglass windows can be used in numerous configurations with other window styles and to make striking door transoms. To make the curved frame sections, we employ pattern-matched extruded aluminum.
- Casement Fiberglass Windows – Milgard casement fiberglass windows provide excellent ventilation, have no rail to obstruct views and put the screen on the inside where it doesn't get as dirty. Milgard jamb hinges allow the window to completely open outward for maximum ventilation.
- Awning Fiberglass Windows – Graceful styling and high-tech engineering make Milgard awning fiberglass windows a popular choice for contemporary, modern and Craftsman homes. Hinged on the top to tilt outward and to enable ventilation even during bad weather. Ideal accent above or below picture windows.
- Bay/Bow Fiberglass Windows – Use Milgard bay or bow fiberglass windows to give a focal point to formal rooms and create the illusion of a bigger interior. Add a feeling of luxury to a master bedroom.






