Flush Casement Windows

8 min read Windows

Quality Flush Casement uPVC Windows

A guide to understanding what flush casement windows are, so you can make the correct decision for your home.
Including one of our leading brands and the benefits they can provide.

A seamless design and contemporary look!

uPVC Flush Casement Windows are one of the most common types of window. A casement window is a window where the opening pane is held on hinges in the frame. The ‘flush’ part? That’s the description of its look. The opening part of the a casement window doesn’t project out of the frame, it lies flush with it.

Our flush casement uPVCs are an ideal window solution for both modern and traditional homes, offering a high energy rating, low maintenance, excellent security benefits and beautiful flush exterior.

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We have taken time and care sourcing the best flush casement windows available on the market; using our expert knowledge and experience to offer our customers great value for money.

Flush casement windows also sometimes known as flush sash windows, or flush sash casement windows, fit flush into the window frame – hence the name – offering a sleek, contemporary finish. Choose from our Liniar Flush Casement or the Deceuninck Heritage Sash Casement ranges for the perfect flush casement window style for your home.

  • Versatile in design, they suit both modern and traditional homes.
  • Sleek and contemporary.
  • Elegant yet highly functional.

Benefits of our Flush Fit uPVC Casement Windows

Our modern-looking new uPVC flush casement windows will look very clean and neat on every home. With almost invisible joints, clean lines and a flat finish, this is a very slim window style. If bulkiness is an issue with your current windows, our flush casement windows could be exactly what you need.

Modern Security

Alongside its contemporary design, our flush casement uPVC windows embrace the latest security features. Further improvements can be made through the addition of modern locking mechanisms to new windows, such as shootbolt espagnolettes and innovative anti-jemmy devices.

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Energy-Efficient Flush Casement Windows

We are dedicated to providing our customers with high-quality, energy-efficient flush double glazed windows at an affordable price. Our flush casement uPVC windows are attractive and stylish, but they also deliver superb energy performance.

With their advanced insulating properties and airtight seal, these flush windows help ensure your home is comfortable year-round while reducing your energy and heating costs.

We only install products that we have the utmost confidence in based on their value, quality, and energy efficiency.

The high energy rating of our new flush casement uPVC windows means your home will stay warm in the winter and cool in the summer, all while saving you money.

As a company that prides itself on offering customers the best possible solutions at a great value, we are pleased to provide these windows that are as easy on the eyes as they are on your budget and the environment.


Flush Casement Windows Tailored to Your Surrey Home!

With a range of colours, effects and finishes to choose from, we’re confident that you’ll be able to design that Flush Casement you’re visualising on your home.

Traditionally, coloured Flush Casements relied on natural pigments and minerals to work well with stone, aged brick and flints. Our colour palette contains a range of colours to suit heritage and modern properties. We also offer finishes which replicate the shades and grain of traditional timber windows.

Every home is unique, which is why we are proud to offer a personalised service to suit each individual project.

chimney on a house

Respecting the past, embracing the future

Our new flush casement windows are authentic, charming and appropriate for traditional and modern properties. For those properties which have a distinctive character, a Flush Casement windows could be ideal.

During the 20th century, living conditions were tough. Houses were cold, damp and draughty, and the security was very basic. Even if you live in a traditional or period home now, we don’t expect that you want to live like our ancestors did.

But what you may want is to preserve the history that your home possesses, and you can do so with our Flush Casements. You can retain the 20th century aesthetics and reach the 21st-century standards of energy efficiency, durability and high security.

Many historic properties have been ruined because their altered, wooden window frames and styles were never part of the original form of historic buildings. Now though there’s no need to compromise!

With an older house, let us measure flush casement windows bespoke just for your period property! Letting more natural light in keeping with traditional timber frames and window design.


Technical Information

Panes & Glazing

Choosing the right glazing options in terms of practicality and aesthetics is made easy when you have a great deal of choice. We offer stained glass, leaded lights and etched panes along with plain and simple double glazing too for your flush window.

We can even add Georgian bars and weather bars to your Flush Casement. Georgian bars are affixed securely to the outer surface of the glass and weather bars are available to retain the authenticity traditional appearance of your property and shed rainwater.



You have many configuration options with our Flush Casement windows, including the shape of it. The clean chamfered lines of our Flush Casement are ideal for outside, and inside you can enjoy a more detailed finish with gently sculptured curves.

Bevelled outside with bevelled or sculptured options for indoors.


Your hardware options will include peg stays and monkey-tail handles in a choice of traditional finishes for your uPVC flush windows.

timber windows


For a truly authentic look, like a traditional wooden window, you may need something surprisingly dark to work with a timber framed house, or for a coastal property, something bright and fresh. You may need the look of natural oak, or for modern properties a deep, flat-textured grey.

There’s a whole host range of finishes available!

green windows

Flush Sash Casement Windows from Deceuninck

There’s no doubt that flush sash casements are a fine choice of window. Although this is the style of window you like, there are still various manufacturers to consider for Flush Sash Casement windows. A leading brand you should consider is Deceuninck.

why choose flush sash casement window from Deceunick

For those who aren’t quite aware of what a flush casement window is, it’s a window that is characterised by openers that close into the frame. The ‘flush’ part of the window is a description of the window’s look – the opening part of the window doesn’t project out of the frame, it lies flush in the frame when closed. This is the key selling point of a flush casement window. It’s a modern looking window with invisible joints, clean lines and a flat finish.

Flush Sash Casement Windows from Deceuninck

A leading product in both performance and style, the Heritage Flush Sash Casement Window from Deceuninck transforms old and new properties with this classic flush window range. As well as offering outstanding energy performance, security and durability, the flush sash is available in a full range of colour finishes, with the ability to match your new flush casement windows across sills, trims and ancillaries.

Why a flush casement from Deceuninck?

There are many reasons as to why you should opt for a Deceuninck flush sash casement window…

Extremely efficient

With outstanding energy performance, security and reliability, it’s a window you can rely on for the future. Compared with aluminium or wood, uPVC windows are low maintenance, have better insulation values and can help to reduce energy costs.

Super secure

The Heritage flush sash casement windows are incredibly durable and secure, ensuring you and your home are safe from all weathers and possible intruders. As standard, the window comes with multipoint locking!

Ideal for conservation

The flush’s external contours are in keeping with period properties and will meet the requirements of most conservation area officers.


The glazing options for your Deceuninck means that you will be able to maximise energy efficiency and sound proofing.

Premium woodgrain foils in 26 colour ways

Every home is unique and the Deceuninck flush casement plays on this with a range of colours. You will be able to choose from 26 colour ways, there are matching ancillaries, trims and accessories.

Other key features of the Deceuninck flush casement:

Sleek slimline frames

Dummy peg stay option

Mechanical or welded transom/mullion joints

Exquisite Georgian bar option

Traditional ironmongery options

Enhanced security PAS 24 Approved

Low Maintenance PVC-U frames

Available in a range of hand-picked Heritage woodgrain finishes

Would you like to see our flush sash casement windows in person?

Come by the showroom and we’ll be able to show and talk you through our range of flush sash casement windows!

Our team is ready to answer any questions you may have about flush windows. We want to make sure you feel completely confident in choosing the perfect flush fit windows style for your home. Let’s create a stunning design together and get you your free quote. Let’s get started!

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One of our team would be happy to have a chat with you about your requirements, answer any unanswered questions and measure up at a time that suits you to provide you a free, no obligation quote.

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“From start to finish, the service has been outstanding, from understanding our requirements and particular wishes, to keeping in contact with us regarding lead times, right through to the fantastic installation guys who worked so hard and completed the installations efficiently and perfectly.”Melinda Weare
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Areas we cover

Sheerwater Glass provides window installation and repairs throughout Surrey and the surrounding areas of our Woking showroom. If you’re interested in our services, we encourage you to check if we serve customers in your area by simply typing in your postcode.

If you check and find that we don’t serve customers in your area, in some cases, we may be able to help. Please call us to find out more.

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