Also known as parting bead. Usually a 3/8” by 3/4” or 1/2” by 3/4” wood piece. Designed to fit in a dado into the pulley stile. Usually held in by a compression fit. Designed to separate the upper from lower sash. Removable. Usually replaced with new.

In a double-hung window, a strip of wood applied to the jamb to separate the sash.

Weather stripping that prevents air and water infiltration. This is commonly found at the head and side jamb of a double-hung unit.

A vertical strip on each jamb that separates the sash of a double-hung window.

Small wood piece used in the side and head jambs of double-hung windows to separate upper and lower sash

A narrow moulding, either integral or applied, that holds a sash or panel in position in a frame.

The portion of a window or sliding patio door that is screwed into a recessed channel to help provide better support for the sash or door panels.