A sill corner for use in a sill assembly supported on a base surface, the sill assembly comprising a vertical jamb and a lineal base member. The sill corner comprises a vertical component with a top surface adapted to receive the vertical jamb and a bottom surface adapted to abut the base surface. A horizontal component extends transversely from the vertical component and the horizontal and the vertical components are a unitary element. The top and bottom surfaces of the vertical component are separated by a height, the height being between about 1.00 and about 3.00 inches.