Composite Windows Basics
Composite windows have one big advantage over vinyl windows - they look nicer. Because they can be painted, most manufacturers make composites with an array of both exterior and interior colors and and/or finishes. The finish can add nice visual interest to the windows that outshines the look of vinyl, fiberglass and aluminum.
Strengthwise, the verdict is out on composites, although it is fair to say that a well made compoiste window will have more than enough strength for any residential project. Composite windows do a decent job in terms of performance and energy efficiency, although nothing mind blowing (top vinyl windows will get better U-value and AI than the best composite windows.)