Chartwell Wooden Windows’ look at casement windows

Casement Windows

A traditional casement window.

For our fifth window type, we look at one kind which was popular in the UK, prior to the arrival of sash windows in the 17th century. That of casement windows.

Casement windows can be hinged on the left and right sides, with the windows being akin to double doors. With a single opening, hinged on either the left or right sides, or from the top or bottom. Usually, they are held together with a Casement Stay. For draught exclusion, they are more efficient than sliding windows.

Top hinged casement windows are often referred to as awning windows. Their bottom hinged counterparts are also known as hopper windows. You often see hopper windows on buses and trains as well as buildings. They are opened by a cam handle, crank or lever. Glass panes are set in a rabbeted frame with bevelled putty or a glazing compound. Traditionally, pieces of glass were sealed with lead beading.

Casement windows and their use in natural ventilation systems

In warm climates, casement windows form part of natural ventilation systems. Natural ventilation is a process of supplying air to and removing air from an indoor space, without using mechanical systems.

Chartwell Wooden Windows, 19 April 2017.

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