Ultra™ Series Fiberglass Windows

Beautiful to look at ---- with little upkeep required, Ultra™ Series fiberglass windows are built to last. Through a careful design process, Milgard introduces a window more resistant to heat, bugs and rot to help withstand the harsher sides of Mother Nature. 



We replaced 31 windows of various types with Milgard Ultra products and have superb noise and harmful ray reduction. They open and shut with the precision of a bank vault and are clearly built to last a very long time. The physical strength was important to our selection and we are well satisfied. Our house has received numerous compliments regarding both inside and outside appearance. - Seattle, WA

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Key Benefits

A Fiberglass Frame Designed for Complete Peace of Mind
Tough durable exterior finishes in 7 colors
Full Lifetime Warranty with Glass Breakage Coverage

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Get inspired with beautiful imagery and innovative product features.

The dimensional stability of Ultra™ Series fiberglass windows make it a popular choice for high humidity and high heat environments, such as bathrooms and kitchens.


A Frame for all Seasons

Ultra™ Series windows and patio doors stay true through almost any environment. Because it's made from glass fibers, the frame expands and contracts at approximately the same rate as the insulated glass it holds. This puts less stress on the seals, reduces the chance for seal failure while allowing for a clear, fog-free view.

Ultra™ Series Frame Colors

Milgard Ultra™ Series fiberglass window frames come in a palette of rich, designer colors. From warm 'harmony' to bold 'black bean', get inspired with all the possibilities.

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Customer Reviews for Ultra™ Series Fiberglass Windows