Casement Windows

Casement windows are the most common window type in Europe and have originated from Germany. Their distinctive feature is being connected to the frame through one or two hinges (most frequently two) and secured with simple locking mechanisms such as casement stays, levers or cranks. In terms of shape, most are rectangular, yet square ones can be seen as well (particularly small single windows) and arched ones are still present in older constructions.


Although their functioning mechanism remains the same, casement windows mostly differ in terms of size and opening inwards or outwards. The main categories are:

The single frame. Whereas older properties in Europe more commonly incorporated single windows on smaller wall surfaces, newer constructions often include large single casement windows, which provide a better view and sunlight access.

The double casement (French casement). This is the most common type in existence and is easily operated, comprising two windows hinged on their sides and opening inward or outward.

The push-out casement. Structurally similar to the archetypal casement window, the push-out casement only differs in terms of being opened with the aid of a handle instead of a crank.


Casement windows require a varied amount of maintenance, depending on the materials they are made from. Wooden windows should be painted every few years as wood tends to deteriorate with the passing of time, due to humidity and corrosive agents. Paint tends to flake as well and thus dirt becomes more difficult to remove. Light coloured paint also tends to darken overtime and loses its fresh appearance. Hinges can sometimes become difficult to operate or creaky due to usage; there are several options to tackle this, the simplest and cheapest one being Vaseline. With regards to cleaning, when casement windows open inwards, they are easier to clean than sash windows as both sides of the glazing are accessible from the inside of a building regardless of the height the windows are situated at.