The Drawing above is a complete Double Hung Wood Window Unit which consists of One Frame and two Sashes. The Sashes move up and down and the Frame holds the Sashes in place.
Apron: A piece of interior trim that fits under the Stool. (Usually the same size as the interior casing)
Blind Stop: Pieces of wood that fit on the outside of the Window Frame and holds the Outer Sash in place.
Brickmould: The outer casing on a window that usually fits against the brick on the exterior of a building.
Head Jamb: The top horizontal part of a Window Frame.
Inner Sash: Also known as the Bottom Sash is the part of a Double Hung Window that holds the glass in place and moves up and down.
Interior Casing: The decorative trim that goes on the inside of a building. (On both sides and top of the frame)
Interior Stop: Usually a small piece of trim that fits on the inside of the Window Frame and holds the Inner Sash in place.
Lock: The part of a window that keeps the Inner and Outer Sashes from moving up and down for security.
Meeting Rail: Also known as check rail helps the Inner and Outer Sashes meet together and become weatherproof.
Muntin: Also known as Muntin Bar (Bars are the vertical muntins) fits inside of a sash to hold the glass in place if there are more than one piece of glass in the sash. (This is known as TDL or True Divided Lites)
Outer Sash: Also known as the Top Sash is the part of a Double Hung Window that holds the glass in place and moves up and down.
Parting Strip: Also known as Parting Stop and Parting Bead. Pieces of trim usually 1/2 x 3/4 that fits between the Inner and Outer Sashes to hold them in place.
Rail: The horizontal parts of the Window Sashes. (Top Rail, Bottom Rail, Meeting Rail)
Side Jamb: The side vertical parts of a Window Frame.
Sill: The angled bottom part of a Window Frame that helps direct water away from the building.
Stiles: The side vertical parts of a Window Sash.
Stool: A flat piece of trim that goes on the inside of a building on top of the Sill and Apron also fitting against the inside of the Bottom/ Inner Sash.
Caldwell Sash Company LLC 6020 Scottsville Road Floyds Knobs, IN 47119 502-931-0224