Why Choose Flush Casement Windows?

A+ Rated for Energy Efficiency

Our windows are designed with energy efficiency in mind, ensuring a comfortable temperature inside your home while reducing energy consumption.

Environmentally Friendly

We are committed to sustainability. Our flush casement windows are 100% lead-free and fully recyclable, making them an eco-conscious choice.

Low Maintenance

Unlike traditional timber windows, our flush casement windows require minimal upkeep, giving you more time to enjoy your home without the hassle.

Enhanced Security

Feel at ease knowing that our flush casement windows are internally beaded and fully secure, deterring potential intruders while keeping your loved ones safe.

Variety of Options

From opening configurations, colours, and finishes to hardware and glazing choices, we offer a wide range of customisation options to suit your style and preferences.

Ideal Compatibility

Whether you want to bring a touch of traditional charm to your home or need to comply with planning or environmental restrictions, our flush casement windows are the ideal solution.

Cream flush sash windows uPVC

Timeless Elegance with a Modern Twist with Liniar Original Flush Sash Windows

Our Liniar Original flush sash windows are renowned for their timeless appeal and exceptional performance. Crafted to mimic the appearance of traditional timber windows, the Liniar flush sashes boast a flush finish on the external faces, adding an unmistakable touch of elegance to your home.

These stunning windows offer more than just aesthetics. They come in A+ rated energy-efficient options and can achieve an impressive U-value as low as 0.8 W/m²K with triple glazing. You'll not only enjoy a comfortable home but also contribute to reducing your carbon footprint.

With hassle-free maintenance and a wide range of colours and finishes to choose from, these windows truly exemplify the perfect blend of classic charm and contemporary convenience.

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The Epitome of Innovation and Elegance with Our Liniar Resurgence Flush Sash Windows

Experience the best of modern window technology with our Liniar Resurgence flush sash windows. These uPVC windows retain the aesthetic appeal of traditional timber windows while providing superior energy efficiency, security, and durability.

The Resurgence range features a 70mm sash incorporated within an 80mm frame, eliminating any overlap commonly seen in standard uPVC windows. This innovative design ensures a sleeker profile while maximising both weather resistance and thermal insulation with its double-rebated weather seal and co-extruded bubble gasket.

To further enhance security, the Resurgence series has passed rigorous BSI security testing, obtaining prestigious accreditations such as PAS24 and Part Q compliance. The A+ energy rating guarantees optimal efficiency, contributing to lower energy bills while keeping your home comfortably warm.

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Gold oak flush casement window
Brown uPVC flush casement windows

Optima Flush Casement Windows for the Timber-Look Solution

Boasting a flush design that perfectly emulates the traditional timber frames, Optima Flush Casement Windows add an authentic touch to heritage homes and buildings. Equipped with exceptional thermal performance, these windows can achieve an incredible U-value of 0.8 W/m²K along with an A++ energy rating.

The mechanical jointing ensures a seamless finish, while the inclusion of a dummy sash creates a balanced and symmetrical look. With its deep bottom rail, authentic hardware such as monkey-tail handles and dummy peg stays, plus a wide array of colour options including period and dual colours, our Optima Flush Casement Windows can be tailored to suit your aesthetic and practical needs.

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Use our online window and door designer to create the perfect quote and get exactly what you want!

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Blue flush casement window

Frequently Asked Questions

Explore our FAQs to find answers to additional questions you may have about our products or services. If you can't find the answer you're looking for, contact us and we'll get back to you as soon as we can.

Are your flush casement windows suitable for period properties?

Absolutely! Our flush sash windows seamlessly blend modern performance with traditional charm, making them perfect for period properties and conservation areas.

What glazing options do you offer for flush casement windows?

We provide a range of high-quality glass options, including double glazing, triple glazing, and acoustic glass options supplied by industry-leading brand Pilkington.

Can your flush casement windows enhance the security of my home?

Certainly! Our flush casement windows are internally beaded, ensuring maximum security against potential intrusions.

Do you offer installation services in the South West region, including Devon and Cornwall?

Absolutely! DNA Window Solutions covers the entire South West region, providing professional installation services to customers in Devon and Cornwall.

Can I customise the hardware and finishes of my flush casement windows?

Yes! We offer a wide range of hardware styles, colours, and finishes, allowing you to personalise your flush casement windows to effortlessly match your home's aesthetics.


What do our customers say?

Excellent service at a good price

Very pleased with DNA Windows Solutions! They fitted new patio doors and new windows and a new door. Quoted a very fair price indeed for a job that was not that straight forward and invoiced...
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Paul Lonsdale

April 2024

Warm roof installation

Recently had DNA Window Solutions supply and fit a warm roof replacing a 40 year old timber conservatory. Fantastic experience They inspected the site and measured up, confirmed the costs and design in a timely...
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Oli Johnson

March 2023

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Excellent company

We have used DNA Windows now three times, twice for windows and once for complete new gutters and facial boards. I think that tells the story ie their workmanship is second to none and we...
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David Ley

January 2024

I can recommend DNA Windows

I can recommend DNA Windows having just had 4 windows put in. The whole process was easy from the initial phone call, then visit and measure, installation . The guys were polite and efficient in...
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Pip Clewer

January 2024

New composite front door

Excellent customer service, great installation, lovely door at a good price. Far quicker, cheaper and easier to deal with than the big national companies.

Steven Mitchell

January 2024

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Very helpful and polite

My order was not huge, but I received every attention and the installers were courteous and friendly. As an old woman living alone I rate this level of service very highly. And the internal windows...
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October 2023

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