Milgard Ultra

Experience exceptional strength and enduring performance with Milgard’s C650 Ultra™ Series—premium fiberglass windows engineered to withstand the harshest climates while maintaining their beauty for decades. Constructed from one of the most durable materials available, these low-maintenance windows are ideal for any architectural style and climate condition.

Fiberglass delivers superior energy efficiency because it resists expansion and contraction caused by temperature fluctuations, making the C650 Ultra Series an outstanding choice for regions with extreme weather. This dimensional stability helps maintain tight seals and consistent performance year-round, reducing energy costs and enhancing home comfort.

Customize your windows with four sophisticated exterior color options—black bean, bark, harmony, and frost—paired with matching or white interiors to complement your design vision. A wide variety of grid patterns and combinations add architectural interest, while attractive hardware in five finish options (white, clay, dark bronze, brushed chrome, or black) provides both beauty and effortless operation.

Whether building new or renovating, the C650 Ultra Series combines the remarkable durability of fiberglass with refined aesthetics and secure, easy-to-operate hardware that hits all the right notes for discerning homeowners.