At The Sash Window Workshop we often get asked what is the difference between a sash window and casement window by customers.
To address this uncertainty, we have created a simple infographic to highlight the main differences, alongside some of the benefits and issues associated with each type of window (click on the image to view a larger version).
Sash windows normally open by sliding vertically, although occasionally they will slide horizontally instead. Wooden sash windows were common in both the Georgian and Victorian periods, although the styles of window varied. Some Edwardian properties also contain sash windows.
Sash windows generally have a higher air leakage rate than casement windows, as casement windows close by pressing against a frame. It is therefore important to ensure that your sash windows are draught proofed.
Problems with the sash cords or spirals can result in sticking or dropping sashes. If your sash windows are draughty or don’t work properly, contact a professional, like The Sash Window Workshop, to fix them for you.
What is the difference between single hung and double hung sash windows?
Sash windows can either be double hung or single hung. Double hung sash windows mean that both the sashes (the moving parts of the window) are operational.
In contrast, single hung sash windows are where only one sash can be moved. Most single hung windows will have the lower sash being operational, with the top sash being fixed.
What is the advantage of double hung windows?
One benefit of double hung sash windows is that they allow for better ventilation than casement windows or single hung sash windows. By opening both sashes you can keep your room cooler in the summer months by allowing the warm air to flow out and allowing cooler air into the property.
Casement windows normally open outwards like a door, although some casement windows will open inwards. These windows are attached with two or more hinges.
Casement windows were popular in the Tudor period, before becoming popular again in the Edwardian era.
One of the benefits of casement windows is that they are harder to break into when the window is locked. This is due to the lock being within the frame and the window opening outwards, making it harder for someone to force the window open from outside.
Casement windows are also able to open out fully meaning that they can provide better views than sash windows.
However, casement windows will be more exposed to the elements due to opening outwards. They also have more mechanical parts to them, meaning there are more parts to the window that could go wrong. This means that they can need more regular maintenance than sash windows.
The Sash Window Workshop
The Sash Window Workshop specialise in the repair and replacement of both wooden sash windows and casement windows. To obtain a free, no obligation site survey and quotation, contact us on 01344 868 668.