UPVC Casement Windows


The window that suits any property from any period

Combine the latest technology with a traditional look and you arrive at the PVCu casement windows. With so many colours and designs to choose from these windows can suit any property and more importantly will suit any budget.


Design Your Perfect Window


Our standard PVCu range consists of a chamfered profile and a sculptured profile. Both profiles require minimal maintenance whilst offering increased durability and excellent thermal efficiency.


Our inspiration comes from the buildings and environment around us. Our designs are flexible, versatile and are created to suit all properties alike. Choose between chamfered casement, Sculptured casement, tilt and turn, and tilt and slide windows. We believe whatever the project there is a casement window to suit.

Product Overview


The PVCu casements can suit and property from any period. The casement window is the most versatile of all windows and with colour matching ancillaries, trims and accessories, you can truly experience the flexibility and customisation that our PVCu Windows have to offer.

Energy Efficient

Our Manufacturers use of cutting-edge technology and the latest materials is constantly expanding. Take the latest high performance weather seal as an example, incorporating large contact surface area generating superb insulation and sound proofing properties.


There are numerous glazing options for all projects including acoustic glass (specifically designed to reduce noise levels), Solar control glass, decorative glass, obscure glass and much more. Thames Windows and Doors only use “A” rated double glazing unless otherwise specified.

Flush Casement UPVC Windows

Flush casement UPVC windows are the perfect solution for balancing aesthetic appeal, durability, and performance. Flush casement UPVC windows are designed with a level frame and sash, offering a sleek, contemporary look while embodying the essence of traditional design. They are also great for energy efficiency, as they can be up to A++ energy rated.

What are Flush UPVC casement windows?

Flush casement UPVC windows are a popular choice among homeowners and builders for their clean lines that sit flush within the frame, offering a minimalistic and refined appearance. They are made from Unplasticized Polyvinyl Chloride, UPVC, which has a higher weather resistance than most other materials.

What are the benefits of UPVC casement windows over traditional wooden or aluminium windows?

Depending on preference, different materials will work for different people. Compared to traditional wooden or aluminium windows, flush casement UPVC windows offer several advantages.


UPVC is known for its excellent thermal insulation, making these windows more energy efficient. Unlike aluminium, UPVC is a poor conductor of heat, further enhancing its insulation properties and making flush casement UPVC windows a superior choice for energy-conscious homeowners.


They are also more durable, resistant to weathering, and require less maintenance than their wooden counterparts. UPVC is a non-corrosive material, which also is not affected by sun bleaching. Giving them a life span of up to 35 years.

Energy Efficiency

One of the standout features of flush casement UPVC windows is their energy efficiency. The combination of UPVC frames, which have natural insulating properties, and the option to incorporate double or triple glazing, means these windows can significantly reduce heat loss. This not only keeps homes warmer in the winter and cooler in the summer but also leads to considerable savings on energy bills.

Noise Reduction Capabilities

For those living in busy areas or near main roads, flush casement UPVC windows can dramatically reduce outside noise, thanks to their tight seals and the option for double or triple glazing. This enhanced sound insulation creates a quieter, more peaceful indoor environment, making these windows an excellent investment for improving the quality of home life.

Security Features

Security is a one of the biggest concerns for any homeowner. Equipped with robust locking mechanisms, strong frames, and durable glazing, they offer a high level of security against potential intruders, providing peace of mind to homeowners.

What is the installation process for UPVC casement windows?

The installation of flush casement UPVC windows is a straightforward process for professionals. Thames Windows and Doors ensures a seamless and efficient installation, from the initial measurements and removal of old windows to the precise fitting and finishing of the new flush casement UPVC windows. Our experienced team guarantees minimal disruption and optimal results.

How are UPVC casement windows maintained?

Another benefit of flush casement UPVC windows is their ease of maintenance. Unlike wood, UPVC does not warp, rot, or require repainting. A simple wipe down with soapy water is usually enough to keep these windows looking as good as new, making them a low-maintenance option for busy homeowners.

Why Choose Thames Windows and Doors?

When it comes to flush casement UPVC windows, Thames Windows and Doors are the standout suppliers. Our commitment to quality, customer service, and expert installation ensures that you receive the best products and experience. We have a wide range of flush casement UPVC windows to suit any home’s architectural style and personal taste, backed by guarantees for added assurance. Want to learn more about the best window solution for you? Contact us on 020 7205 2444 and speak to a specialist, today!

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Contact Thames Windows & Doors Ltd by phone 020 7205 2444