Design history


At we offer you several combinations of window design and glazing bar options.

Glazing bar design – changes through time

Georgian (18th Century)

Georgian windows were designed with a special Classical relationship between their widths and heights, known as the Golden Mean (approx 1:1.6). The glass panes were designed to conform to these same proportions. The overall effect was a carefully contrived harmony between glass and window frame proportions. Even where opes had to depart from that proportion, the glass proportions were maintained in that ratio, by having a different number of panes in the top and bottom sash, as illustrated below.

Regency (early 19th century)

Later, Regency windows used the ability (then new) to make larger glass panes, as seen here:

Victorian (mid-to late 19th century)

By Victorian times, even larger glass panes allowed 2 panes over 2

Edwardian (early 20th century)

The final sash window development, at the turn of the twentieth century, was the elimination of that last vertical glazing bar, in the Edwardian window.