light arrangement
The number and patterns of panes in a window. In a double-hung window some have the same number in the upper and lower sash: (1) one-over-one, (2) two-over-two, (4) four-over-four, (6) six-over-six, (8) eight-over-eight, (9) nine-over-nine, (10) ten-over-ten, (12) twelve-over-twelve, and (15) fifteen-over-fifteen. Another common variation is a multi-paned upper sash over a single paned lower sash: (2) two-over-one, (4) four-over-one, (6) six-over-one, (12) twelve-over-one, (15) fifteen-over-one, and (40) forty-over-one. Another variety is multi-paned upper and lower sashes: four-over-two, four-over-six, six-over-four, six-over-nine, eight-over-twelve, nine-over-six, nine-over-nine, twelve-over-eight, twenty-light sash, and twenty-five-over-twenty window. Photo from Appomattox Courthouse National Historical Park, Appomattox Courthouse, Virginia, 2021. (Kremer, 2023)
Table of Light Arrangement with Upper Sash in X-axis and Lower Sash in Y-axis
List of Window Types by Pane Count
- 2 – one-over-one
- 3 – two-over-one
- 4 – two-over-two
- 5 – four-over-one
- 6 – four-over-two
- 7 – six-over-one
- 8 – four-over-four
- 9
- 10 – nine-over-one, four-over-six, six-over-four
- 11
- 12 – six-over-six
- 13 – twelve-over-one
- 14
- 15 – six-over-nine, nine-over-six
- 16 – eight-over-eight, fifteen-over-one
- 17
- 18 – nine-over-nine
- 19
- 20 – twenty-light sash, twelve-over-eight, ten-over-ten, eight-over-twelve
- 21
- 22
- 23
- 24 – twelve-over-twelve
- 25
- 26
- 27
- 28
- 29
- 30 – fifteen-over-fifteen
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41 – forty-over-one
- 42
- 43
- 44
- 45 – twenty-five-over-twenty window
See Also