A casement window has a casement sash attached to the timber frame by hinges on one side; it can be inward or outward opening. Casements can also be hinged at the top or the bottom of the window, making it possible to open the windows in several different ways and making an efficient use of the available space.
Sash box windows have been used for many years in Victorian and Georgian properties but have recently regained popularity for those who wish to give a more classical look to modern houses.
Spring sash windows are the modern-day alternative to traditional sash box windows. They are very similar in design, with the difference that spring sash windows utilise a different mechanism to control the window opening, namely balance springs.
Sash box windows can also utilize the so-called “tilt and slide” system. The opening mechanism remains the same of two separate sashes sliding parallel to each other, with the addition they can also be tilted in for easy cleaning.