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Sash

The framework that holds the glass, and the part of the window that moves.

A sash is a frame of stiles and rails that holds the glass. It is the part of the window that opens.

A double-hung window has two sashes that both slide vertically: an upper sash toward the outside and a lower sash toward the inside. On a single-hung window only the lower sash moves.

A casement window has a single sash hinged along one side, and it swings outward instead of sliding.

An awning window is the same idea turned on its side: one sash hinged along the top that swings outward from the bottom, so it can stay open in the rain.

Related

• StileThe vertical side members of a sash.
• RailThe horizontal members of a sash.
• Meeting railThe rails where the upper and lower sashes meet when the window is closed.
• MuntinA narrow bar that divides a sash into smaller panes.
• LiteA single pane of glass in a sash.
• Parting stopThe thin strip between the two sashes that keeps them in separate tracks.
• StopThe strip on the room side of the frame that keeps the lower sash in its track.
• HingeThe pivot on one side of a casement sash that lets it swing open like a door.
• Wood windowA window whose sash and frame are milled from solid wood.
• Vinyl windowA window built from hollow extrusions of rigid PVC.