The Difference Between Sliding Window and Casement Window

The Difference Between Sliding Window and Casement Window

29 Sep 2021

Nowadays, the windows of the house are of various shapes. Different styles of windows can bring different decorative effects to our overall home situation. Sliding Windows and casement windows are common window types in daily life. What are the characteristics of these two window types? 

What’s Sliding Window and Casement Window?

Sliding Window
A sliding window refers to a window that slides left and right in the horizontal direction. That is to say, the advantage of this kind of window is that the window does not take up extra space regardless of the state of opening and closing, and the structure is relatively simple.
Casement Window
The casement window is combined with the window frame through a hinge, and the window sash can be rotated and opened. Casement windows can be divided into side-opening windows and hanging windows according to the sliding direction. Side opening windows are generally used for main windows with larger areas. Hanging windows are mainly used for ventilation in the kitchen and bathroom.
Sliding Window
sliding window
  1. Simple and beautiful, with large pieces of glass, which not only increases indoor lighting but also improves the overall appearance of the building.
  2. The sliding window is opened in a plane and will not occupy the external and internal space.
  3. Adopt slide rail design, flexible opening.
  4. It is beneficial to hang curtains, install screen windows and install protective nets.
  5. The window sash can be disassembled, which is conducive to cleaning work.
  6. There are many materials for sliding windows, such as wood, plastic steel, and aluminum alloy.

Casement Window
  1. Simple structure, large opening area, generally up to 50% of the whole window, which is conducive to lighting and ventilation.
  2. It has good air tightness when closed, and has the characteristics of sound insulation, heat preservation, and excellent heat resistance.
  3. Flexible use, safe and reliable, and long service life.
  4. Inner-opening casement windows are conducive to cleaning, but take up part of the indoor space.
  5. The open-out type occupies a space outside the wall. Be careful when it is windy or rainy.
  6. There will be no rainwater accumulating in the casement window.


1. Appearance
Sliding windows are opened in a horizontal direction, which can be moved up and down, or left and right and pulleys need to be installed on the windows. Sliding windows are generally composed of two windows, and only one window can be opened when opened.
The casement window can be composed of one window or two windows, which can be opened outward or inward.

2. Material
Sliding windows are generally sealed with wool strips, and the sealing effect of rubber strips is generally better than that of wool strips.
Casement windows generally use sealing rubber strips, and the sashes are usually locked and sealed with special locks.

3. Performance
The performance of casement windows, such as ventilation, airtightness, and heat preservation effect, is better than that of sliding windows.

4. Cleaning
The window track of the sliding window is easy to accumulate dust and needs to be cleaned regularly.
The casement window has no groove part.

5. Application
In order to avoid falling objects from a height, sliding windows are most suitable for high-rise buildings. In addition, sliding windows are also commonly found in buildings such as rural houses and industrial plants.
Casement windows are usually used in medium and high-end buildings such as urban commercial and residential buildings, and office buildings.


Zeao Metal is one of the high-quality aluminum window manufacturers and suppliers in China. If you are interested in learning more about the professional knowledge of aluminum windows, we look forward to getting in touch with you.