Source DescriptionA jalousie windows is a double window, generally made of glass, wood, or acrylic louvers set inside a wooden frame. The louvers are attached to a roller mechanism so they can be tilted up and closed in unison for control of air, commonly by pulling a cord. Unlike other types of French windows, jalousie windows have no internal frames, and instead their outside frames hold the louvers. Because of this they have a more contemporary look than many other styles of French windows. This article will briefly WDMA discuss the history of the use of these windows. For centuries, the window was used as both a way to let people in and to keep homes private. Many wealthy families would have separate homes with mansions containing private doors. These windows were also used as part of a wall, often creating an interior courtyard or foyer. In order to gain access to the upper floors of the buildings, the peasants would break down the walls using ladders and...