Fiberglass Windows

Exceptionally strong and low-maintenance fiberglass windows

from Milgard are ideal for any style and climate.

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.

Advantages of Fiberglass Frames

  • Traditional wood profile
  • Extremely strong—can hold large expanses of glass
  • Low maintenance
  • Paintable

 

Fiberglass windows and doors 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.

Milgard’s fiberglass is produced using a process called pultrusion. Glass rovings and mats are pulled at tremendous forces through a resin bath and a series of dies. These materials combine and catalyze to provide tensile and torsion strength. All final products undergo extensive testing for quality and consistency.

Colors

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

Explore the color palette > 

Now you can have superior, energy efficient, low maintenance vinyl, with more color flexibility. Enhance the look of your home and coordinate with your exterior trim, siding and stucco.

Our premium colors bring out the clean lines and angles of the window frame. Each color suits a neutral look, whether in light and dark variety, and can blend in with the surrounding wall color and create a smooth, contemporary look in your home.

New! Black Capstock exterior finish offers a matching interior and is only available on Trinsic Series. Standard colors of white and tan have a color matched interior. Painted exterior finishes have a white interior only.

Ultra”‘ Series windows and patio doors have fiberglass frames inside and out with four exterior colors available. Each exterior color can be paired with a white interion However, you can color-match both the interior and exterior colors in Harmony, Bark or the popular Black Bean.