Flush Casement Windows Key Features
If you’re looking to upgrade your existing windows with high performance models, our flush sash windows are a solution. When you upgrade your home with Starglaze, you are guaranteed high performing, secure and durable installations that won’t only perform for years to come but look the part too.
To instantly revive the style of your home, the Alitherm 400 flush casement window is expertly crafted to provide a contemporary and stylish look. Their flush fit that sits within the frame, combined with their clean lines, creates a sophisticated and seamless appearance.
Durability is a key factor to consider with your replacement windows. With our range, you don’t have to worry about wear and tear, as our Alitherm models are built to withstand weather and years of use.
When replacing your windows, thermal insulation is another important factor. Alitherm 400 flush casement windows are expertly designed with high quality materials and advanced glazing technology to ensure that they provide excellent thermal insulation. Keep your Lincoln home warm in the winter and cool in the summer.
Transform Your Home's Look: Explore Our Window Colour Selector - Preview
Our Extensive Range of Exterior and Interior Shades.
Single Colours
Our single colours are readily stocked and available with quick turnarounds.
Anthracite
Chartwell Green
Black Ash
Anthracite Grained
Nut Tree
Irish Oak
Classic Cream
Golden Oak
Rosewood
White Grain
Dual Colours
Enjoy interior and exterior customisation, as well as shorter delivery times with our stunning dual colour options.
Heritage Colours
Available for fast dispatch, our heritage colours offer shorter delivery times.
Premium Colours
Providing exceptional quality and individuality, our non stocked premium colour are available at an additional cost with extended lead times.
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Anthracite
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Chartwell Green
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Black Ash
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Anthracite Grained
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Nut Tree
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Irish Oak
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Classic Cream
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Golden Oak
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Rosewood
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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White Grain
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Anthracite Grained - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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White Grained - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Grey Ali - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Nut Tree - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Irish Oak - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Rosewood - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Golden Oak - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Chartwell Green - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Classic Cream - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Black Ash - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Anthracite - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Agate Grey - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Black Smooth - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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English Oak - English Oak
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Black Ash - Heritage White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Anthracite - Heritage White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Agate Grey - Heritage White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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English Oak - Hertiage White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Heritage White - English Oak
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Heritage White - Heritage White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Ice Cream - Heritage White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Basalt Grey - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Silver Bullet - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Quartz Grey - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Vin Rouge - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Smooth Sage - white
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Slate Grey - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Soft Cherry - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Rustic Cherry - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Pepper Oak - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Grey - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Honey Oak - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Fir Green - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Ginger Oak - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Dark Red - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Pyrite Metallic - white
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Cedar Grey - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Agate Premium Grey - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Bronze Metallic - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Claystone - White
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*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
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Blue Steel - White
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Our Most Popular Colours
Available in a wide choice of colours and finishes, you can customise your your Smart Alitherm 400 flush casement windows to meet your needs. With a world of choice, thanks to RAL colour options, a choice of wood finishes and even dual colour options where you have different colours on the inside and outside of the frame, your window installation can exude your personal taste.
Clear
Arctic
Autumn
Casin
Chantilly
Charcoal Sticks
Contora
Cotswold
Digital
Everglade
Flemish
Florielle
Mayflower
Minister
Oak
Pelerine
Reeded
Stippolyte
Sycamore
Taffeta
Tribal
Warwick
Glass Selected:
Clear
Wide Range of Glazing Options
We provide a diverse selection of stained and bevelled glass designs so that you can create striking and impressive windows. With our extensive range of styles, we are certain that our Lincoln and Lincolnshire based customers can easily find the ideal solution for their property.
*Glazing configurations are for illustration purposes only. For detailed glazing options, contact us today or visit our showroom.
Antique Black
Grey
White
Brilliant Bronze
Chrome
Satin Chrome
Gold
Solid Gold
Black
Extensive Choice of High Quality Hardware
We provide a variety of high quality hardware options that can perfectly replicate the look of traditional flush casement windows or add a more modern touch. With three designs and nine colour finishes available, you can fine tune your installation with Starglaze/ Our handles come in three different designs and are available in nine color finishes.
Download Your Brochure
Explore our full range of aluminium windows and doors by downloading our online brochure today! Discover more information on our product range and custom options, as well as gain helpful technical information too.
Get Your Aluminium Flush Casement Window Quote Today!
Your brand new, aluminium flush casement windows are just a few clicks away. Use our bespoke online pricing tool to get a price tailored to your project today!
Explore Our Virtual Showroom
Can't make the journey to our showroom? We've replicated our products virtually. Whether you're interested in uPVC windows, aluminium doors or other products, we've uploaded all our profiles for you to view from the comfort of your home or on the go. Take a look below!
Benefits of Our Alitherm 400 Flush Casement Windows
Faster Installations
The Alitherm 400 flush casement windows are designed for quick and easy installation. They feature Smart’s innovative QUICKglaze bead, which shortens both fabrication and installation time, allowing for swift and straightforward aluminium window installations.
Thanks to the clip-in bead technology, our installers can save time on-site and complete your window installations more efficiently.
Unbeatable Performance
This leading flush casement window profile boasts outstanding thermal efficiency and exceptional energy performance. With an average U-value of 1.4 W/m²K and an ‘A’ Energy Rating, we ensure exceptional quality.
With the Alitherm 400 range, our customers can rest assured that they won’t face higher energy bills, as excellent thermal regulation provides comfort and efficiency throughout the seasons.
Guaranteed Security
Our thermally broken aluminium flush casement windows are reinforced with advanced security features. They meet PAS24 or Secured By Design standards, thanks to the optional sash claw locks.
Additionally, the Alitherm 400 flush casement range delivers excellent weather performance, meeting the standards of BS EN 1026, BS EN 1027, and BS EN 12211.
Traditional & Modern Styles
To match any preference, our windows are available in a variety of styles, colours, and finishes. Whether you favour a traditional or contemporary appearance, you can choose from four options: standard, slimline, flush, and heritage-style sashes. Each is designed to suit your taste and complement the architecture of your property in Lincoln and Lincolnshire.
Market Leading Flush Casement Windows
Alitherm 400 flush casement windows are a perfect choice for enhancing your home’s aesthetic appeal and energy efficiency. These windows offer a sleek, modern design while delivering superior thermal and weather performance.
Manufactured by Smart Systems, the Alitherm 400 is a versatile window and door system suitable for various projects. The system fully complies with Part L of the Building Regulations – ensuring excellent weather resistance and thermal efficiency. With a wide selection of colours available, you can customise your windows to match your home’s style perfectly.
Eco Friendly Modern Design
Our aluminium flush casement windows are an environmentally friendly choice. Made from sustainable, recyclable materials, we contribute to the goal of achieving net zero emissions by 2050. From using eco-conscious resources to minimising our carbon footprint, we are dedicated to providing homeowners with sustainable solutions.
Learn more about our commitment to Net Zero 2050 at Starglaze.
Download Your Brochure
Don’t forget to download a brochure. They’re packed with plenty of additional information, including technical information, detailed colour swatches and photos for inspiration.
Visit Our Stunning Showroom
Booking an appointment to visit our showroom can help you find the perfect product for your home.
Save On Your Energy Bills
Start considering your energy efficiency and sustainability, and even save on your energy bills by making the switch to our products and services.
Durable Design
Our aluminium window range is designed to provide durable and long lasting security to your Lincoln home.
Energy Efficient
The brilliant thermal performance of our aluminium windows ensures that you and your property will stay warm no matter the weather or season.
Maintenance Free
The design of our aluminium flush casement windows guarantees years of maintenance free comfort.
Use our energy calculator to find out how much you could save on your energy bills!
Energy Saving Calculator
Use our energy calculator to find out how much you could save on your energy bills!
Aluminium Flush Casement Window Prices Lincoln
At Starglaze, we pride ourselves on offering market leading products that are competitively priced. We strive to provide the best value for our double glazing range in Lincoln and Lincolnshire, and our Alitherm flush casement windows are no exception.
For a personalised aluminium window or double glazing quote, feel free to call our friendly team at 01522 512020, or fill out our contact form to reach us online. Our team will get back to you promptly to assist with your enquiry. Alternatively, you can use our online quoting engine to get a guide price.
Click the button below to start your quote for our aluminium flush casement Windows.
frequently asked questions
What is a Alitherm 400?
Are flush casement windows worth it?
Are aluminium windows better than uPVC windows?
Triple Glazed Flush Sash Windows – Mr Wells
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Flush Sash Double Glazed Windows – Mr Prestwood
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