ALUMINUM: Offers a sleek contemporary look. The exterior is anodized to resist corrosion. One of the many advantages of aluminum windows is its strength. Aluminum is three times as strong as vinyl and forty-three times stronger than wood.

THERMAL BREAK: Some aluminum windows and doors are designed with internal thermal breaks, non-metal components that reduce heat flow through the frame. These thermally broken aluminum frames can resist heat flow considerably better than aluminum frames without thermal breaks.