- Head Jamb The upper portion of the window, represents the top of the entire window
- Jamb Supports the outer edges of the window
- Check Rail Where the top and bottom sash meet
- Bottom Sash The entire lower assembly of panes, typically moves
- Sill The lower portion of the window, typically protrudes out from the wall
- Glazing Refers to the layers of glass or process used to apply material to the glass surface
- Sash Lock Hardware that locks the sashes in place
- Top Sash The entire upper assembly of panes, in a double hung slides up and down
- Exterior Casing The entire outer portion of the window, hold the sashes in place
