Thermal Efficiency
Conservation Area Approved
10 Year Guarantee
FENSA Approved
Smooth, Elegant, and Secure
Why Should You Choose Our Flush Casement Windows?
When you choose our double glazed flush casement windows, feel assured that they come with a smooth and elegant design. The flush casement windows fit flush in the frame and neatly inside the wall opening, which creates a seamless connection in your home. Perfect for a traditional property as it gives a modern appearance, improving the market value of homes in London, Surrey, and Kent.
Our double glazed uPVC flush casement windows offer high levels of security. Their lockable handles make it difficult for them to be opened from the outside, protecting you from forced break-ins. Additionally, our flush casement windows come with transparent or obscure glass for improved privacy and better views, optional Astragal or Georgian bars, and accessories such as monkey tail handles, connoisseur handles, and pear drop handles.











Key Features of Our uPVC Flush Casement Windows
Choose From a Range of Colours and Styles
We know that every homeowner in London, Surrey, and Kent is unique. That’s why we offer our double glazed flush casement windows from Deceuninck in a bespoke range of styles and colours for you to choose from. Whether it’s a white flush casement window or an anthracite grey flush casement window, you are spoilt for choice.
Our double-glazed uPVC flush casement windows are available with stylish handles and furniture, such as our monkey tail handles, teardrop handles, or connoisseur handles. For extra privacy, choose from our range of obscure or toughened glass options to improve your home’s style and security.
Glazing Options
Our uPVC flush casement windows are double glazed as standard and can be relied on to deliver a consistent level of security, energy efficiency, and noise insulation. However, if you wish to improve them further or add a personal touch, there are several options.
For instance, you can increase the number of panes with a triple glazing upgrade. This will result in stronger windows, even better thermal retention and quieter homes. If you’re concerned about privacy, we have fifteen different obscure glass designs that will stop passers-by from looking in without limiting the light levels, and we also have acoustic laminate glass to reduce external noise further. You can find further information on our Glazing Options page, but don’t hesitate to call if you have any questions.

Frequently Asked Questions
Our Most Common Queries
What are flush casement windows?
Flush casement windows are designed with the sash sitting flush within the frame when closed, offering a sleek and flat exterior finish. They replicate traditional timber window aesthetics but can be made from modern materials like uPVC or aluminium.
How are flush casement windows different from standard casement windows?
The main difference is in the windows’ design. Our uPVC flush casement windows are designed with the sash sitting flush with the frame, whereas standard casement windows often have a slightly overlapping or protruding sash.
Are your flush casement windows soundproof?
If you are living in a built up area, you will be pleased to know that our double glazed uPVC flush casement windows are soundproof. The high quality double glazing and seals will help reduce loud noises.
Can double glazed flush casement windows be installed in listed buildings or conservation areas?
Yes, flush casement windows are often approved for these settings due to their traditional appearance, especially timber versions or those with authentic detailing.
Are flush casement windows secure?
Yes, they are equipped with advanced security features, such as multipoint locking systems, toughened or laminated glass options, and strong, durable frames.
Are flush casement windows energy efficient?
Yes, flush casement windows often come with weatherproof seals to offer better thermal insulation, helping homeowners in London, Kent, and Surrey save on their energy bills.