Because they open up instead of out, double-hung windows don't take up exterior space when open. This makes them ideal for areas like adjoining walkways, porches, patios and other high-traffic areas. Double-hung windows look best in more traditional architectural styles such as French, Colonial, Craftsman, Shingle and Victorian.
Double-hung windows differ from single-hung windows due to the fact that both sashes are moveable. In addition, both sashes tilt for easy cleaning.