What a View! Windows
Apron--the board below the window stool on the interior of the home. This piece of trim covers the gap between the window frame and the wall.
Casing--the finishing trim that covers the gap between the window element and the structural framing of the house.
Dormer--a window projecting from the roof line of a home; common types include gabled and shed dormers. Dormers are often used to provide light to bedroom or sleeping room (latin--dormitorium).
Fanlight--a small semicircular or rectangular window over a door or another window.
Jalousie--several horizontal slats that can be adjusted to admit light and air but exclude rain and the rays of the sun. Popular in tropical climates prior to the widespread use of air conditioning.
Light--In architecture and home design, a light is a single pane of glass set within a larger window opening, usually held in place by muntins.
Mullion--a slender vertical element that forms a division between units of a window or door opening.
Muntins--strips of wood, metal, plaster, or other material that form a grid to support the glass panes, or lights. On newer windows this may be decorative only. Muntins are sometimes referred to as grills in modern design discussions.
Palladian--a large window that is divided into three parts. In proportions the center section is larger than the two side sections and is usually arched while the side sections are flat. On Federal style houses, there is often a Palladian window in the center of the second story. The term "Palladian" comes from Andrea Palladio, a Renaissance-era architect.
Pane--a single continuous piece of glass set within a larger window opening, usually held in place by muntins. Early glass windows were often made of many small panes due to the difficulty of working with glass; today, it is not unusual to have floor-to-ceiling sheets of glass available for design and construction. In earlier literature on architecture, panes are referred to as "lights."
Rail--the horizontal support members of the sash along the top and bottom.
Sash--a portion of the window that can be raised and lowered to allow fresh air into the structure.
Sill--the lower part of the frame meeting the wall of the structure. It is usually angled downward towards the exterior of the home to shed water away from the window.
Stile--vertical supports for the sash.
Stool--the lower, interior horizontal board which resembles a shelf.
Transom--a strengthening crossbar set above a window or door.