What Is a Casement Window?

January 25, 2024



4-wide casement windows that open out to a backyard with a pool

A casement window is a type of window hinged on one side and opens outward with a crank mechanism. Known for its classic design and versatility, it offers unobstructed views, excellent ventilation, and a tight seal when closed.

Also known as swing-open windows, windows that open out, crank windows, and swinging windows, all casement window types can be customized to suit different architectural styles. Their simple operation and ability to catch breezes make them popular choices for both traditional and contemporary homes, adding charm and functionality to any space!

Ontario homeowners love vinyl casement windows because of their simplicity, versatility, and ability to resist moisture, rusting, and weathering. Industry-leading window manufacturers, like Clera Windows + Doors, use 100% pure virgin uPVC and heavy-duty galvanized steel hardware to create virtually maintenance-free windows and protected from fading.

So, what are casement windows? Keep reading to learn more about the types of casement windows, their benefits, and applications in the home.

5 Benefits of Choosing Casement Windows

Homeowners have varying preferences when it comes to windows. But most, if not all, prioritize the following:

  • Provide a clear view of the outside and allow the sunlight to pass through
  • Keep the home ventilated
  • Keep precipitation out
  • Keep street noise out
  • Keep the home insulated during extreme temperatures

1. Unobstructed Views

With their outward swing, these windows that open like doors offer unobstructed views of the surrounding landscape. Whether overlooking a picturesque garden, a scenic vista, or a bustling cityscape, these windows provide uninterrupted sightlines, bringing the beauty of the outdoors inside.

An opened wooden window shows a lush green view of tall trees and shrubs

Image source: Canva

2. Superior Ventilation and Plenty of Sunlight

If you’re looking for windows that open out fully, allowing maximum airflow into the home, then look no further! This design promotes efficient ventilation, circulating fresh air and expelling stale odours, moisture, and indoor pollutants. These swing-open windows also provide plenty of sunlight, making your home shine brighter

It’s true that not all window types offer the same opening flexibility as casement windows; they are the perfect choice since their swinging features are adjustable, giving you more control over ventilation. 

3. Great Options for Egress Windows

In case of emergencies, such as fires, egress windows provide a quick and unobstructed exit route. Unlike other window types, casement windows open fully outward, allowing occupants to escape without encountering obstacles. Their low threshold also facilitates swift egress, particularly for children, the elderly, or individuals with mobility limitations.

Additionally, most if not all casement window types comply with building codes for egress requirements, ensuring safety and peace of mind. 

4. Excellent Energy Efficiency

Vinyl casement windows are extremely energy efficient. When closed, their sash presses tightly against the frame, creating an airtight seal that prevents drafts and energy leakage. This thermal efficiency reduces reliance on heating and cooling systems, lowering energy consumption and utility costs. By improving the overall energy efficiency of the home, casement windows contribute to a more sustainable and environmentally friendly living space.

Even better, you can boost your energy efficiency by switching to low-E glass, double or triple glazing, spacers, and multiple panes!

Read more: What is Solar Heat Gain Coefficient and Why Does It Matter?

5. Abundant Customizable Design Options

Homeowners can design their casement windows in a variety of ways. This includes:

  • Window material
  • Colour finishes (many manufacturers will colour match!)
  • Window hardware (handles, hinges, etc.)
  • Grille patterns
  • Custom sizing and shape
  • Window openings
  • Unique combinations and configurations with other window types like awning windows and picture windows 

Types of Casement Windows

Get to know all the casement window types here and how they operate

1. Out-Swinging Casement Windows

Out-swinging casement windows are the most popular among homeowners. The sashes swing outwardly up to a 90-degree angle from a side hinge. Windows that open outwardly like doors take up less interior space than those that open into the home.

2. In-Swinging Casement Windows

Opposite to out-swinging windows, in-swinging casement windows allow the sash to open inwardly from a side hinge. The downside here is that the sash will take up interior space when the window is open. 

It’s the ideal casement window for rooms that don’t have space outside for the sash to swing. Good placement examples are in narrow walkways, balconies, or spaces with limited exterior clearance. These types of swinging windows are also commonly used in multi-storey buildings or high-rise apartments.

A bedroom in a high-rise apartment with in-swinging windows 

Image Source: Canva

3. Energy-Efficient Casement Windows

Casement windows stand as champions of energy efficiency, offering a seamless blend of functionality and sustainability. With their innovative design and advanced features, energy-efficient casement windows prioritize thermal performance, reducing heat loss in winter and heat gain in summer.

These windows boast high-quality materials, low-emissivity coatings, and multi-chambered frames, creating a barrier against outdoor elements while maximizing indoor comfort.

4. Decorative Casement Windows

Elevate your home's aesthetic appeal with decorative casement windows, adding charm and character to any space. These windows go beyond mere functionality, serving as architectural focal points that enhance curb appeal and interior ambiance.

With a myriad of design options, including decorative glass patterns, custom grille designs, and ornate hardware finishes, you can personalize your casement windows to reflect your unique style and complement your home's architecture.

Get Canadian-Made Casement Windows at Clera Windows + Doors

If you’re still wondering, “What is a casement window?” or what casement windows offer, call the professionals at Clera Windows + Doors to walk you through our design, manufacturing, and installation process. 

With over 45 years of experience in the Canadian fenestration industry, it’s our mission to customize casement windows that meet and exceed your unique needs. Homeowners can expect features like low-E glass technology engineered specifically for Canadian climates, wet-glazed frames and sashes, triple-fin weatherstripping, and galvanized steel hardware when they shop our collection of replacement windows.

We can’t wait to work with you!

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