The sash window comes in many forms, but none, perhaps, are so iconic as the Victorian box sash window. While the original style was built to be flat and vertical, in a time when narrow streets and alleys would not have allowed for larger windows that jutted outwards, the box sash was a very popular Victorian innovation that has since become synonymous with the window style.

Following the Industrial Revolution, the Victorian Era was a time of advancement and great strides in the development of glass technology, among many other things. Victorian homeowners were fond enough of the original sash window, but the upper classes especially sought after something a bit more exclusive, a bit more refined that what was the norm. As such, the Victorian style featured canted bays as opposed to owed ones, forming the iconic box shape of the box sash.

The upper classes proved that they …