A very popular window unit in which the single sash that opens outward to the left or right, projecting off the plane of the wall. The sash unit is hinged on one side and is operated by a crank mechanism.
Energy efficiency: These windows operate with an outward movement and close to a tight seal around the entire window.
Ventilation: Casement windows open outward allowing the home owner to choose how much or how little air flow they want.
Variety of designs: Casement windows come in a variety of colors and designs; also the crank used to open the window can come in many different colors to match the home.