What Are French Casement Windows?
French casement windows are double glazed opening casement windows with two sashes that open outside from the centre. Unlike traditional window designs, french casement windows do not have a fixed central mullion, which means both sides can be opened together to create a wider and clearer opening.
This makes french casement windows a popular choice for rooms where homeowners may want better ventilation, less obstructed views of the outside and more natural light.
In this article, we will go over everything about how french casement windows work, how they compare to other windows and where they are best installed and used.
What Is A French Casement Window?
A french casement window is a window that has two side-hinged sashes that open outwards from the middle. When both sashes are open, there is no fixed centre mullion blocking the view, creating a bigger opening allowing for more natural light, garden views and air.
How Do French Casement Windows Work?
French casement windows work very similar to french doors. Each sash is hinged on the sides and opens outwards from the centre. One sash opens first and then the second one follows.
When both sides of the window are open, the window creates a wide opening without a fixed centre mullion. This helps to make the room feel fresher, brighter and more connected to the outdoors.
French Casement Windows vs Standard Casement Windows
The main differencce is how the window works and opens, and whether there is a fixed centre post or not.
| Feature | French Casement Windows | Standard Casement Windows |
|---|---|---|
| Opening style | Two sashes open from the centre | Usually one opening sash or fixed/opening sections |
| Centre mullion | Usually no fixed central post | Often has a fixed frame section or mullion |
| View | Wider, clearer opening | More frame interruption |
| Ventilation | Excellent when both sashes open | Good, but the opening may be smaller |
| Best for | Living rooms, bedrooms, kitchens and garden views | Most rooms and general window replacement |
Benefits Of French Casement Windows
French casement windows are chosen for their wide opening, flexible ventilation and clearer views.
Wider Opening
Both sashes can open from the centre window to help create a larger opening than standard window designs.
Better Ventilation
Opening both sides of the window lets in more fresh air into the room, which can be very useful for bedrooms, living rooms and kitchens.
Clearer Views
With no central fixed post, french casement windows can give a better view of the outside space and the garden.
Classic Appearance
French casement windows can suit both traditional and modern homes, depending on the frame colour and glazing style.
Flexible Use
You can open one sash for some ventilation and fresh air or both for a wider opening.
Modern Performance
Modern uPVC french casement windows offer low maintenance, energy efficenct glazing and improved security.
Where Do French Casement Windows Work Best?
French casement windows work really well with rooms that have a clear view and wide opening.
Living Rooms
A wide opening can help a living room feel brighter, fresher and more connected to the garden.
Bedrooms
Opening both sashes can help improve airflow, especially in warmer months.
Kitchens
French casement windows can help with ventilation and allow more natural light into the kitchen.
Garden-Facing Rooms
With no fixed centre post, they can create a clearer view towards the garden or outdoor space.
Are French Casement Windows Energy Efficient?
French casement windows can be energy efficient when they are installed with modern double glazing, well-made frames and quality seals.
The overall energy performance can depend on the glazing specification, installation quality and frame material used. uPVC french casement windows are a low-maintenance option and can come with energy-efficient double glazing to help reduce heat losee compared to older window systems.
Learn more about double glazingAre French Casement Windows Secure?
Modern french casement windows can be installed with strong hinges, durable frames and multi point locking systems.
Because both of the sashes can open wide, it is important that the window is design and installed with the correct locking points.
View our window optionsAre French Casement Windows Right For Your Home?
French casement windows might be right for your home if you want a wider opening, a clear view or better airflow. They can be really useful where the window looks outside to an attractive space or garden.
However, they might not be the best choice for every room in the house. Narrow openings, smaller rooms, bathrooms and stairwell sometimes work better with standard casement windows and other window styles.
French Casement Window Colours And Styles
French casement windows can be designed in a wide range of finishes and colours to suit your home. White remains the classic choice for windows, while anthracite grey and grey windows are popular for a much more modern look.
You can also choose glazing options, frame styles to help suit modern properties, traditional homes and replacement window projects.
Popular options include grey windows, RAL 7016 windows and classic white uPVC windows.
Frequently Asked Questions
Common questions about French casement windows.
What are French casement windows?
French casement windows are double opening casement windows with two sashes that open outside from the centre. They do not have a fixed centre post, creating a much more wider opening.
What is the difference between casement and French casement windows?
A standard casement window may have only one opening sash or has a fixed centre section, while a french casement window has two opening sashes that join in the middle and open together.
Do French casement windows have a central mullion?
French casement windows usually do not have a fixed centre mullion. This is why it creates a wider clearer opening when both are open.
Are French casement windows good for ventilation?
Yes, french casement windows can be very good for improving ventilation because both sides can open at the same time, allowing more air to enter the home.
Are French casement windows secure?
Modern french casement windows can be made secure with quality frames, locking systems and hinges. Security can depend on the product specification and final installation.
Where are French casement windows best used?
French casement windows are often best used for bedrooms, kitchens, living rooms and garden faceing rooms with wider opening and clearer views.
Thinking About French Casement Windows?
At St Helens Windows, we can help you find the right window style for your home, create a brighter living space and improve ventilation.
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