Strong and Durable Aluminum is strong and rigid. Moreover, aluminum's properties will not change over time, a claim that cannot be made by many other materials. It's easier to install, and more resistant to frame deformation caused by climatic changes and building movement. Over time, changes in temperature and humidity can cause some window-frame materials to bend and twist leading to seal failure, air and water leakage, and difficulty in opening and closing swinging or sliding window elements. Because aluminum framing members are little affected by temperature variations and are stable in changing humidities, they maintain their effective weather sealing and ease of operation over the long term.
Condensation is undesirable and can be damaging if it occurs on window frames.
Manufactures today use a variety of glazing methods and frame designs to minimize window condensation. Performance with Minimum Maintenance Aluminum is a stable material, with consistent and predictable properties. It doesn't absorb moisture, so it won't swell, shrink, warp, twist, split, crack or check. It can't rust. Its strength and rigidity are unaffected by weather and time.