Windows

The parts of a window, from the casing on the wall to the glass in the sash. Take the quiz

All terms

• ApronThe trim board on the wall directly beneath the stool.
• Bay windowA window assembly that projects outward from the wall, made of several angled units.
• Blind stopThe strip on the outside of the frame that the upper sash closes against.
• BrickmouldThe molded trim that frames the window on the outside wall.
• Casement lockThe lever on the latch side that pulls a casement sash tight against the frame.
• CasingThe molding that frames the window on the interior wall.
• Center unitThe middle window of a bay, parallel to the wall.
• Drip capThe sloped cap over the top of the window casing that sheds water away from the wall.
• FlankerOne of the angled side windows of a bay, joining the center unit to the wall.
• GlazingThe glass in a window, and the work of installing it.
• HeadThe horizontal top member of the window frame.
• HingeThe pivot on one side of a casement sash that lets it swing open like a door.
• HornThe end of a sill or stool that extends past the side casings.
• JambThe vertical side members of the window frame.
• LiteA single pane of glass in a sash.
• Meeting railThe rails where the upper and lower sashes meet when the window is closed.
• MullionThe member that separates two adjacent windows in the same opening.
• MuntinA narrow bar that divides a sash into smaller panes.
• OperatorThe hand crank that swings a casement sash open and closed.
• Parting stopThe thin strip between the two sashes that keeps them in separate tracks.
• RailThe horizontal members of a sash.
• SashThe framework that holds the glass, and the part of the window that moves.
• Sash liftThe handle on the lower sash used to raise it.
• Sash lockThe latch on the meeting rails that holds the two sashes closed.
• SillThe bottom member of the window frame, sloped outward to shed water.
• StileThe vertical side members of a sash.
• StoolThe interior ledge at the bottom of the window.
• StopThe strip on the room side of the frame that keeps the lower sash in its track.