Window sill

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# Sill # lintel

A window sill (also written as windowsill or window-sill) is the surface at the bottom of a window. Window sills serve to hold the window or glass in place and also provide a mechanism for the shedding of rain water away from the wall directly below the window.

A window sill can be the horizontal piece below a window unit in masonry construction or in wood framing. The sill of the window frame sits on the window sill of the wall opening.[1] The lowermost, interior trim work on a window may also be referred to as a window sill.

See also[edit]


  1. ^ Sturgis, Russell (1901). A Dictionary of Architecture and Building: Biographical, Historical, and Descriptive. vol. 3. New York: The Macmillan Co.