By Steve Graham, Networx

Old, drafty windows can cause up to 50 percent of heat loss in the winter, and at least as much heat gain in the summer. Most homeowners have heard about double- and triple-pane windows, and energy-efficient glass.


However, energy efficiency for windows doesn't stop with the glass. There are many considerations for maximizing the efficiency of window frames, too. Look at the materials, style, shape and installation of any window.