A double-hung window is similar to a single-hung window however both the lower sash as well as the upper sash can move up and down and usually tilt out for easy cleaning and maintenance in this common window type.

Bay windows protrude from an exterior wall and create a small shelf in the home. Bay windows rely on flat windows set into an angled frame that is built out of the home. A bay window costs more to install as it is a larger window that requires a skilled installer.