Casement Windows

The traditional Timber casement became the most common window type during the eighteenth century. It developed from the stone mullioned window. The earlier designs had the opening part of the window – the casement – made of iron with lead lattice work and subdivided by glazing bars which joined together the small panes of Glass.

By the middle 1800’s, the frames and opening casements were made completely out of timber. The most common pattern were windows of 6 panes, but as glass technology improved, the number of panes per casement was reduced to two with one horizontal glazing bar.

In 1856 Sir Henry Bessemer pioneered a new production process for hot rolled Steel, which had a dramatic effect on industrial growth. It was from this point that the next stage of metal window development began

Although Sash Windows became hugely popular during the Victorian era, Casement Windows could be made more easily and cheaply and after the First World War started a resurgence in popularity. Crittall windows led the way in steel casement windows and from humble beginnings in Braintree in 1849, became synonymous with this type of window.