Fiberglass Windows

Fiberglass frames are essentially composed of glass fibers and resin, materials that expand and contract very little with temperature changes in the weather. Until recently, the complex profiles required for window designs have been impossible to attain with fiberglass. Innovation has made it possible to design a fiberglass frame and fiberglass windows and patio doors are becoming more popular among homeowners for its beauty and long-lasting durability. Fiberglass windows and doors can replicate the look and feel of wood with a veneer while helping to resist swelling, rotting and warping. The frame expands and contracts at approximately the same rate as the insulated glass it holds for improved energy efficiency and strength. While fiberglass frames do not require repainting for upkeep, the material is able to be repainted if you prefer to change colors.

Advantages of Fiberglass Frames

- Traditional wood profile

- Extremely strong—can hold large expanses of glass

- Low maintenance

- Paintable

Swing & Sliding Doors

The strength of fiberglass protects your investment from the harsher side of Mother Nature. Because of its inherent properties, fiberglass won’t swell like wood and it expands and contracts at the same minimal rate as glass. Fiberglass won’t crack, peel, warp, split, pit, or corrode and is virtually impervious to water. Our fiberglass doors are available with your choice of baked-on standard colors for a finish that protects against UV rays. Ultra & WoodClad patio doors come in sliding, in-swing or out-swing styles and built to your specifications with panels, transoms, or sidelites. Choose from a variety of hardware and virtually endless grid options.

Milgard Ultra™ & WoodClad™ 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. Add warmth with a Clear Vertical Grain Douglas Fir veneer option on WoodClad™ Series windows.

Ultra – as the name implies – was designed to be the ultimate in window and door frame material. Ultra combines the benefits of fiberglass with the style of traditional wood windows.

Explore the Color Palette >


MILGARD ® Product Series

Ultra™ Series | WoodClad™ Series


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