What Should You Choose Between Sliding or Casement Window?

Sliding vs Casement window

Windows come in various shapes, sizes, and forms and can be customized to your exact preference. However, deciding the right style and design can be challenging and requires expert advice. To help you make an informed final choice, below is an in-depth comparison of the various attributes and pros of arguably, the most common styles of windows, sliding and casement windows.

Introduction to Sliding VS Casement Window

Both types offer unique advantages, and comparing their pros and cons will help you determine which one suits your needs. However, before going into the advantages and disadvantages of casement windows and sliding windows, you need to know their features and differences.

What is a Casement Window?

Casement windows are generally connected by two or more hinges and are cranked to be open. Casement windows can also be opened both in and outwards but generally open outwards.

The windows also feature a safety hook or friction hinge option to keep the window steady, making it a good investment in windy areas.

Casement windows come in singularly or in pairs sharing one frame.

What is a Sliding Window?

Unlike casement windows, sliding windows are not connected with any hinges. They slide back and forth or sash open- either up or down. A sliding window is similar to a double-hung window turned sideways. It complements colonial and traditional style properties well.

Sliding windows function seamlessly with walls where there is insufficient height to utilize but sufficient horizontal space.

Fortunately, there is an assortment of sliding door window treatments that you can add to enhance the appeal or added functionality like blocking light.

Pros and Cons Between Sliding Windows and Casement Windows

Sliding Windows Pros

  • The windows are easy to operate and open, translating to less potential mechanical failure.
  • Sliding windows allow you to choose the exact space size you want to leave open. As such, you can regulate fresh air flow into your room.
  • The windows blend in perfectly in refurbishment houses, period properties, and instances where the alternative (casement windows) are considered too modern and contemporary.
  • Sliding windows are a less costly option than casement windows.
  • Double sliding windows have improved security features that include two-track latches that lock at the end of each sliding sash.
  • Sliding windows also don’t open outwards, meaning less potential safety hazard to passers-by.

Sliding Windows Cons

Dust, dirt, grime, bug juice, small insects, wall debris, and pollen lodged in the tracks, often increase friction and can cause your windows to bind and stick in their tracks. To some extent, they tend to be a little bit hard to maintain .

Casement Windows Pros

  • These options are easily customizable and can be tailored to match different styles. They are also available in different frames, meaning they can suit different home types.
  • Casement windows are secure and offer an added level of security. The windows come with a lock system integrated into the frame, making the windows hard to break into.
  • Casement windows are also the most passable of all window options. While it makes breaking into the room easier, it also makes it easier to pass across in the event of a fire.
  • Casement windows are easy to clean and maintain since you can open them to gain access to both sides.
  • With both casement and sliding windows are open, casement windows tend to appear far more attractive
  • The window casements are also flush with nearby panes and can be bigger than sliders while remaining functional.
  • They are also easy to operate and tend to be the wider option in some instances.
  • Casement windows offer more ventilation and fresh air flow when open.
  • They are highly energy-efficient since they form a tighter seal when closed.
  • Casement windows have an Egress-friendly design. Add at least one casement unit for each finished room to meet the fire egress code.

Casement Window Cons

Unfortunately, when left open outwardly, they pose a safety hazard to passers-by.

Sliding or Casement Windows

How to Choose A Sliding or Casement Windows

When choosing a window style, you ought to know what you are looking for, the main characteristics, and which between the two matches your filters and needs.

Why Casement Windows?

These have a simple model. In a nutshell, the casement window brings you a glass panel that features a frame, and it opens almost as much as a door. You can opt for one that opens inwards or outwards, but the majority open outwards.

The frame itself is attached to a hinge, meaning you can crank it open or shut.

As previously mentioned, casement windows have security hooks or friction hinges, keeping the window steady, especially if your environment is windy on most days.

The casement windows are your ideal choice if you want 100% ventilation and an easy-to-clean window type. They may pose a security feature since they open outwards, leaving sufficient space for a break-in. However, this can be remedied by installing security grilles.

Why Sliding Windows?

Why Sliding Windows?

If you worry about security, then the casement window is not the best solution. Sliding windows often save plenty of space since they can be customized to fit walls without excessive vertical clearance if there is sufficient horizontal space.

Sliding windows tend to fit the more traditional styled homes, making them less versatile than the casement windows.

Sliding windows are your ideal choice if you want a window type for your traditionally-styled home. They are also the perfect option if you are on a budget.

It boils down to the features you want and those you are willing to forego. The common characteristics that can help you to choose between the two include;

Physical differences. What are your window dimensions, and which window type will fit perfectly?

Window ventilation. Do you want the regulated fresh air flow provided by double sliding windows or the 100% fresh airflow provided by casement windows?

Energy efficiency

Security features



Choosing between casement and sliding windows can be a struggle but a good investment in the end. The double sliding window is more secure than the casement windows. However, casement windows provide full ventilation since they open all the way compared to sliding windows.

China Lesso is a leading provider of sliding and casement windows. It offers a comprehensive range of products for home constructions, repairs, and renovations.

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