Design Windows and Doors, Inc.
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Fiberglass Windows

Fiberglass windows and doors are a natural insulator because it does not expand and contract or conduct hot or cold like wood or vinyl does. Windows made of fiberglass are 3x more energy efficient and 8x stronger than windows made of other material. In addition there are many colors and styles to choose from.

The main reason that fiberglass is chosen is because fiberglass is a stable material that only has slight expansion and shrinkage when the humidity and temperature changes. This is especially important if you live in an area with high temperatures or humidity.

Fiberglass is made out of glass, which is a common and abundant resource.

Benefits of Fiberglass windows and doors:

  • Environmentally Friendly
  • Energy Efficient
  • Durable
  • Low Maintenance
  • Comes in many colors

Our fiberglass windows come with the best warranties in the industry. You can customize them with our wide selection of hardware finishes and virtually endless grid options.

Fiberglass manufacturers that we carry are Milgard and Anderson.

Milgard ® Product Series

Ultra™ Series