Windows & Bays

A window is an opening in the wall or building that function to admit light or air.  In a masonry wall, a window is a brick, block or stone opening into which a window unit can be placed.  Openings may incorporate window ledges and arches.

A bay is a unit of form in architecture.  This unit is defined as the zone between the outer edges of an attached column, pilaster, or post; or within a window frame, doorframe, or vertical ‘bas relief’ wall form.  A bay on the walls of a building can be the opening in the wall consisting of a window between the window frame