Sash windows are an iconic feature of traditional British architecture. They are made of timber and consist of two movable sashes that slide vertically up and down within the frame. Sash windows were first introduced in the 17th century and became particularly popular during the Georgian and Victorian eras.

Sash windows are not only beautiful, but they are also practical. They allow for plenty of natural light to enter a room and can be opened to provide ventilation. However, over time, sash windows can become damaged or worn out. The timber frames can rot, the glazing can break, and the sliding mechanism can become stuck.