Casement vs. Sliding Windows

If you are a homeowner, who is considering the replacement of your house’s windows, and are pondering whether you should opt for casement windows or sliding windows, you’ve come to the right place. Both these windows are a great option for any house. However, they are both very different from one another, and they both have their own merits and demerits. Here are a few pointers to keep in mind while you make your final choice between casement window replacement or sliding window replacement:

Physical Differences

Casement windows are operationally the most popular windows in households across the world. They open out sideways, up to an angle of 90 degrees. Their movement is controlled by a crank, handle, or lever. Normally, they are more preferred for taller and narrower windows and are popular as front windows. On the contrary, sliding windows are almost like hung windows, sliding one on top of the other, only horizontally instead of vertically. They are more prominent in wider window spaces and are seen more in basements, backyards, etc.


Structural limitations limit the amount of ventilation a certain window provides. Casement windows, when opened, are open completely from end-to-end, allowing for maximum ventilation. On the contrary, sliding windows always have one panel overlapping the other, resulting in only half the window being open at a time. This restricts the amount of ventilation the house would get. Also, the swinging nature of casement windows makes it an air break, which could result in damage, making for high casement window replacement costs. Sliding windows are more sturdy in windy atmospheres.


Casement windows are one of the most secure operational windows available. They incorporate multi-locking mechanisms controlled by a latch, providing it with extra safety and security. Sliding windows also have locking systems in place, and their self-locking mechanisms make it easy to lock and unlock. Structurally, both windows are safe and secure for most household settings. However, casement windows that often come with multiple glass panels installed, are more vulnerable to thefts and burglary.

Repair and Maintenance

Sliding windows are harder to clean and maintain, as they are more prone to accumulation of dirt and dust. Also, the sliding rubber/fiber mechanism has a temporary life and is prone to damage and wear and tear. Casement windows can be cleaned end-to-end easily, by simply opening the windows. Sliding windows, however, overlap one another, making them harder to clean. Casement windows replacements and installations are easy, compared to sliding windows, given the structural simplicity they have.

Material and Installation Cost

Typically, a casement window replacement would cost anywhere between $270 to $750, depending upon the characteristics of the window. Sliding windows, the more expensive of the two, costs anywhere between $450 to $1300 on average. These costs are inclusive of the labor and installation costs you have to incur. Factors affecting the cost include the material of the frame, the type of glass installed, the frame of the window, the size and shape of the window, and also the technician’s fee.

The opening of the window, its location, and size, your budget and style requirements, etc. – these factors would help determine which window is most suitable for your home. Both windows stand out on different parameters and are both good for any home, and the decision whether to go for casement window replacement or sliding window replacement would involve many factors.

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