Window Classification

 

A window is a pane of glass enclosed in framework. One window may include multiple panes separated by thin strips of wood or metal. These strips form the dividers between panes within a larger frame. If the size of these strips exceeds 7.5 cm (3 in) the area becomes two separate windows. As well, if the distance between the windows is a solid part of the wall, not a part of the window frame, the area becomes two separate windows.

A single window must fit into one wall opening, in a single frame. To be considered a window, it must be an above-grade window, meaning the window is completely above ground level.

Also, the window width or height must be at least 30 cm (12 in). Windows smaller than this are not to be included.

twowindows
An example of two windows separated by part of a wall

 

 

onewindow

 

An example of one window, the panes are separated by thin strips and fitting into one opening in the wall

 

 

 

 

threewindows

 

An example of three windows, each pane is in its own individual frame

 

 

 

 

Picture1

 

Below-grade basement windows are not included window classification

 

 

 

 

Picture2
Above-grade basement windows are included

 

 

 

Picture3
Small windows with a height or length less than 30 cm are not included (pictured in some of the upstairs windows)