What Are Sash Windows?
Sash windows are sliding windows, which usually slide vertically, but which can slide horizontally and which are normally in pairs. The original design of the sash window is attributed to the English inventor, Robert Hooke (1635 -1703) and these windows were, since the 18th century, a very common type of window, especially in Georgian and Victorian houses. In these residences, the most common sash window used was and is the classical style, that being of two frames, each with six panels. This however, was a style particular to those types of residence and is not a fixed rule – many different styles of sashes survive and are in use today. Sash windows have an advantage that allows them to be partially opened without the window falling back into the closed position, as would be expected of a heavy vertical frame. This can be achieved in different ways. Earlier types of these windows had ropes and counter weights (or sash weights) that were set into the window frame. More modern types of
