uPVC Flush Casement Windows

The uPVC flush casement window provides stunning looks, transforming both old and new properties from contemporary townhouses to beautiful country cottages.

Perfect For Period Properties
Designed to replicate the appearance of timber with sleek, slimline frames and authentic colours, our uPVC flush casement windows are ideal for any property where the sash fits flush into the frame.
Traditional Charm
Our flush sash windows look fantastic in any surrounding, with their flush external contours, and elegant style. Georgian bars can be incorporated into the design for further authenticity, transforming a modern town house into the archetypal country house many people dream of.
High Weather Resistance
Offering superior weather resistance, our uPVC flush casement windows have a high performance multifunctional weatherseal. This continuous seal is welded at the corners, maintaining air tightness with no loss of comfort inside the home.
Night Vent Locking Position
The Deceuninck flush sash window has a night vent locking position. This bespoke locking keep allows for secure ventilation as well as full hardware compatibility, giving the Heritage flush sash window unrivalled security.
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High Performance Flush Casement Windows

Inspired by traditional timber joinery, the Deceuninck uPVC flush casement window can be either fully welded or mechanically jointed for a more authentic appearance. This allows them to offer a traditional charm to new builds or an enhancing feature to traditional or conservation properties.

We offer a wide range of high quality, authentic hardware options that allow you to customise your new windows right down to the detail. This includes a range of hinge and handle options, which ensure a traditional look is maintained across the whole of the window design.

These flush sash windows are available in a wide range of high quality colours, which will make it easy for you to find the perfect match for your property. All the colours we offer are applied with a highly durable finish to ensure they maintain their fullness and richness over many years; we also offer matching cills, trims and ancillaries.

Combining modern function with traditional form, our high performance flush casement windows have been designed to ensure modern demands are surpassed. This means that they completely outclass their traditional timber counterparts, which can bow, rot, warp or discolour over time. This means they are sure to be a beautiful investment for your property.

Their intelligent design allows them to guarantee you a home that remains warmer and more comfortable throughout the year. This is made possible with a high performance, thermally efficient profile that works to effectively trap in pockets of warm air, improving the performance of your central heating and reducing heating bills throughout.

They also utilise premium grade uPVC to ensure an impressive degree of structural integrity is maintained. Our flush sash windows offer you peace of mind, with a design that achieves impressive security from the ground up. This is then enhanced with high performance, multi-point locking mechanisms to ensure security remains consistent across the board.

As a Sternfenster Approved Installer we will be able to expertly install these flush casement windows into modern, traditional, period or heritage homes alike. 

We also offer a range of opening configurations and panel options to suit your property, which allows us to offer a new home improvement solution that will perfectly fit the space that you have. An Approved Installer will work with you to customise and operation and appearance of your flush sash windows to ensure they suit you perfectly.

The range of colours and finishes we offer also allows us to achieve increased flexibility in installing our high performance flush sash windows. Whether you’re looking for windows that blend in or catch the eye, we’ll be able to accommodate with our comprehensive selection. It’s never been easier to get the perfect addition to your home.

To ensure performance and aesthetic are maintained over an extensive period, all materials used in the manufacture of our flush casement windows will require minimal input from you to ensure they operate to an ‘as new’ standard. You’ll be able to enjoy market-leading designs without any of the headaches that can occur with inferior designs.

Due to the inherent qualities of high grade uPVC, your flush casement windows won’t rot, warp, rust, bow, crack or discolour over the years. This stands true even in the face of extensive use and prolonged exposure to the elements. They are sure to be a worthwhile investment for your property.

Our uPVC flush casement windows are designed with a unique modern shape and smooth contours, which can be easily maintained with a simple wipe down with a damp cloth. You’ll be able to maintain pristine, traditional aesthetics in a simple, quick and easy manner. There’s no need to settle for less.

• Class A4: 600Pa Air Permeability
• Class 7A: 300Pa Water Tightness
• Class A5: 2000Pa Wind Resistance
• PAS24 accredited
• 1.2 W/m2K U-Value / A+ Energy Rated

Our flush casement windows are available in our standard welded sash, mechanically jointed sash and for slimmer sight-lines, our StyleLine graf welded sash.

Colour Options

The Deceuninck flush casement window is available in a wide range of foiled colours, helping homeowners choose the perfect colour combination for their home. We also offer colour matching ancillaries, trims and accessories – your windows have never looked so good.

Hardware Options

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