Inside horizontal trim located under the window stool at the bottom of a unit.

An odorless, colorless, tasteless, nontoxic gas that is six times denser than air. Replacing the air between two panes of glass with argon gas reduces temperature transfer, making the surface of the g [..]

The center member of a double door, which is attached to the fixed or inactive door panel.

Hinged at the top, this window has a single sash that swings outward from the bottom.

A composite of 3 or more windows that project out from the wall. Usually consists of one large center window with two flanking fixed or operating windows at 30, 45, or 90 degree angles to the wall.

Bottom horizontal member of a window sash.

A composite of 3 or more windows in a radial or bow formation. Typically consists of casement windows both fixed and operating assembled at 10 degree angles from the wall.

Standard outside casing around the window to cover the gap between the window frame and the opening. Nails are driven through the molding to install the window to the framed opening.

A hardware device used to operate a casement window to any open position.