This website makes references to a number of terms that may not be familiar to you. Use the links below to explore this glossary.


Mansard Roof

roof having two different slopes on all sides; the lower slope being steeper than the upper slope



organization of three-dimensional volumes or spaces into a coherent composition


Meeting Rail

in a double-hung window, the horizontal element created where the top of the lower sash frame meets the bottom of the upper sash frame when the window is closed



dominant or distinctive feature or element of a design



decorative element that defines edges, joints or surfaces through the use of a continuous profile



vertical member between adjacent window sashes or between windows and doors



small member that supports several pieces of glass within a sash