The term “casement” refers to a specific style of window characterised by its functionality and design. Casement windows attach to the frame with side hinges, allowing them to swing open and provide excellent ventilation. Understanding the meaning and features of casement windows can help you decide if they are the right fit for your home.

Defining Casement Windows

Hinged Design

Casement windows use side-mounted hinges that allow the window to swing open outward or inward, much like a door. This hinged design sets casement windows apart from sliding or fixed windows.

Operable Sashes

The operable sash is the part of the window that moves. In casement windows, the sash pivots on the side hinge, creating an opening for ventilation and access.

Crank or Handle Mechanism

Casement windows often feature a crank or handle to open and close the window. This mechanism allows precise control over the angle and width of the opening.

Casement Windows and Their Key Features

Single Casement

A single casement window includes one sash that opens to one side. This style is common in kitchens, bathrooms, and smaller spaces where a compact design works best.

Double Casement (French Style)

Double casement windows, often referred to as French casement windows, feature two sashes that open outward from the centre. This style provides symmetrical aesthetics and wider openings for ventilation.

Top-Hung Casement

Top-hung casement windows hinge at the top and open outward from the bottom. This variation suits spaces where side openings may not be practical.

What Makes Casement Windows Unique?

Maximised Ventilation

Casement windows open fully, allowing maximum airflow. Their design directs breezes into the home more effectively than other window styles.

Unobstructed Views

The full glass panels of casement windows provide clear, uninterrupted views of the outdoors. Their design minimises framing, enhancing the aesthetic appeal.

Energy Efficiency

Casement windows close tightly against the frame, reducing air leaks. When paired with double or triple glazing, they offer excellent insulation and help lower energy costs.

Casement vs. Other Window Types

Comparison with Sash Windows

Sash windows slide vertically or horizontally within their frame, unlike casement windows, which swing open on hinges. The sliding mechanism is the key difference.

Comparison with Fixed Windows

Fixed windows remain stationary and do not open, providing only light and views. Casement windows, in contrast, allow ventilation and accessibility.

Comparison with Awning Windows

Awning windows hinge at the top and open outward from the bottom. While similar to top-hung casement windows, their hinge placement distinguishes them.

Why Choose Casement Windows?

Versatility

Casement windows work well in both traditional and modern homes. Their clean lines and functional design make them suitable for various architectural styles.

Durability

Modern casement windows often feature materials like uPVC, aluminium, or composite, ensuring long-lasting performance with minimal maintenance.

Safety Features

Casement windows can include locks and security features, enhancing the safety of your home without compromising ventilation or style.

Conclusion

The term “casement” on a window refers to its side-hinged design, operable sash, and crank mechanism. Casement windows provide excellent ventilation, energy efficiency, and aesthetic appeal. Whether used as single or double casements, these windows enhance the functionality and beauty of any space.