Flush Casement Windows
Have a Look At Our Flush Casement Windows
At Warm Windows & Doors, we offer beautifully crafted flush casement windows that combine classic style with modern elegance. With sleek, clean lines and advanced insulation, they’re perfect for improving your home’s looks and kerb appeal. We supply and install across Milton Keynes, Northampton, and Leighton Buzzard. Contact us today when you’re ready to get started.
Sleek, flush-fitting design for a modern or heritage look
Excellent thermal performance to reduce energy bills
Enhanced security with multi-point locking systems
Low-maintenance frames built to withstand the elements
Modern Looks and Timeless Elegance
Our flush casement windows blend the timeless look of traditional timber with the modern benefits of uPVC, making them ideal for both heritage homes and contemporary builds — even in conservation areas. With U-values as low as 1.2 W/m²K, they offer superb insulation, noise reduction, and weather protection, all while sitting perfectly flush in the frame for a beautifully authentic finish.
Built to Last
Flush casement windows from Warm Windows & Doors significantly improve your home’s visual appeal and aesthetics. The seamless finish and traditional joinery bring a refined, heritage feel, while the modern uPVC construction ensures they are built to last for many years.
Design Your Perfect Flush Casement Windows
Colour Options
At Warm Windows and Doors, we understand that colour is essential for enhancing your personality. That’s why we offer Deceuninck’s full collection of 30+ colourways — all inspired by nature and designed to look fantastic for years. With matching cills, trims, end caps and ancillaries available in stock and ready for next delivery, your flush casement windows can be fully customised to fit seamlessly with your home, or create your individual personality. Our dual colour options are also available, giving you a choice of different internal and external shades for a tailored finish.
Agate Grey
Anthracite Grey Smooth
Anthracite Grey
Balsalt Grey
Black Ash
Bronze Metallic
Chartwell Green
Classic Cream
Claystone
Dark Red
English Oak
Fir Green
Ginger Oak
Golden Oak
Grey Cedar
Grey
Honey Oak
Ice Cream
Irish Oak
Moss Green
Nut Tree
Quartz Grey
Pyrite Metallic
Rosewood
Rustic Cherry
Sage
Silver-Bullet
Slate Grey
Soft Cherry
Steel Blue
Vin Rouge
White Grain
Key Features of Our Flush Casement Windows
Take a look at some of our key benefits of our flush casement windows here.
Environmentally Friendly
Improve your home’s energy efficiency and reduce your carbon footprint with our high-performance, fully recyclable uPVC flush casement window profiles.
Maintenance Free
Our uPVC flush casement windows are easy to look after. They don’t need much to clean, just a regular wipe down with a cloth and soapy water to make sure they look as good as new.
Unlimited Colours
Choose from over 30 stunning Deceuninck colourways, alongside our dual colour options, for a perfect internal and external finish.
Related Products
We have a selection of related products alongside our flush casement windows that you can also consider. Take a look at some of them here.
FAQs
Got questions about our flush casement windows? Explore the FAQs below for quick, clear answers to help you choose with confidence.
What are flush casement windows?
A flush casement window is a type of window where the sash (the part that opens) sits level with the outer frame when closed, creating a smooth, flat finish. This design replicates the traditional appearance of timber windows, making it suitable for both heritage homes and contemporary properties.
Are flush casement windows energy efficient?
Yes, absolutely. Our flush casement windows are designed with high-performance glazing and thermally efficient frames, achieving U-values as low as 1.2 W/m²K. That means better heat retention, lower energy bills, and a more comfortable home.
Do flush casement windows need much maintenance?
Not at all. Made from high-quality uPVC, they won’t rot, warp, or need repainting like timber alternatives. A quick wipe with a cloth now and then is all they need to stay looking fresh and clean.
Can I customise the colour of my windows?
Yes – we offer over 30 beautiful colourways, including traditional woodgrain finishes and modern shades. You can also choose dual colours, with a different finish inside and out to match your décor.
Are these windows suitable for conservation areas?
In many cases, yes. The traditional styling of flush casement windows makes them ideal for conservation areas, and they’re often accepted by local planning authorities. We can help guide you through any planning requirements if needed.
Are my flush casement windows soundproof?
Yes. Our flush casement windows are built with noise-reducing glazing and tightly sealed frames, making them a suitable option for homes near busy roads or other noisy areas.
What kind of glazing options are available?
We offer a full range, including clear, frosted, decorative and energy-saving glass. You can also choose between double or triple glazing depending on your insulation and security needs.
What hardware options can I choose from?
You can select from a wide range of handle styles and finishes, including tconnoseiur, monkey tail, and teardrop options. Popular colours include chrome, gold, black, and Graphite, which are built to complement your chosen colour.
Get in Touch With Us Today
Ready to upgrade your home with flush casement windows in Milton Keynes, Leighton Buzzard or Northampton? Our experienced team at Warm Windows & Doors is here to help. Get in touch today for expert advice, a no-pressure quote, and a warm, professional service you can trust.
Start Your Online Quote
It’s never been easier to start your next project. Just hit the button below, design your perfect flush casement windows, and we’ll send you a personalised quote tailored to your needs.