Stellar Aluminium French Casement Windows
Uninterrupted views, traditional character, and exceptional thermal performance. Enjoy the classic look of twin opening sashes with a floating mullion that creates a wide, clear opening—perfect for garden views and fire escape compliance.
Why Choose Stellar Aluminium French Casement Windows?
Warmth & Efficiency
Nobody wants draughty windows. The Stellar French casement system is built with advanced thermal break technology that locks heat inside the property. With standard double glazing, it easily meets Part L requirements with an A energy rating ($1.1\text{ U-value}$). Upgrading to triple glazing delivers ultimate thermal performance, while high-performance weather seals keep out driving rain and cold winds.
Strength & Security
These windows are built to protect. Inherently strong by design, the Stellar system features shootbolt multi-point locking mechanisms and concealed hinges that remove common points of attack. Meeting strict PAS 24 security standards right out of the box, every window is backed by the Yale Total Trust Guarantee for complete peace of mind.
A Perfect Fit for Any Project
Ideal for cottage-style homes, upper-floor bedrooms, or openings requiring an unobstructed view, the French casement design features a flying mullion. When both sashes are opened 90 degrees, you get a completely clear, wide-open view with no central frame post in the way, providing a fully compliant egress fire escape. Because it is a complete system, we supply every matching cill, coupler, and trim required to guarantee a neat, professional, and perfectly colour-matched finish every time.
Colours & Finishes to Match Your Home
Express your personal style with our durable, marine-grade powder-coated finishes. Our Stellar aluminium French casement windows come in popular stocked colours – including Signal White, Anthracite Grey, and Jet Black – or any custom RAL colour to perfectly suit your property.
White
Cream
Anthracite Grey
Rosewood
Chartwell Green
Light Oak
Black Brown
Agate Grey
Irish Oak
Smooth Anthracite Grey
Pebble Grey
Slate Grey
Inspiration & Style Ideas
Custom Styling & Hardware Finishes
The finishing touches make all the difference to a property’s character. Our French casement windows can be tailored with traditional astragal bars or internal Georgian bars to suit period properties, or left clean and simple for contemporary designs. To complete the look, we offer matching master and slave handle sets available in flawless finishes including Chrome, Gold, Graphite, Satin, White, and Black—all chosen for smooth, dependable daily operation.
Simple Care & Maintenance
Keeping your powder-coated aluminium frames in top condition is straightforward. Wash the frames at least twice a year (or every 3 months in coastal or high-pollution areas) using warm water, a mild non-alkaline detergent, and a soft cloth, then dry thoroughly.
Always avoid abrasive cream cleaners, solvents, bleach, or ammonia. Once a year, apply a few drops of light machine oil (such as 3-in-1 oil) to pivot points, shooting bolts, and locking mechanisms, and keep the hinge tracks clear of debris for smooth operation.
Aluminium French Casement Windows FAQs
At EWE Building Plastics, we’re always here to help. We’ve gathered some of our most frequently asked trade and DIY queries below to help get your window project moving quickly. If your question isn’t answered here, or you have a project ready to price up, get in touch with us today and a member of our team will be delighted to help you get started.
A French casement window features two sashes that open outward from the centre, similar to French doors. One sash incorporates a ‘flying mullion’—a central post attached directly to the opening frame—so when both sashes are opened, you get a completely clear opening with no central fixed frame post.
Yes. Because the central mullion opens out with the secondary sash, French casement windows create a wide, unobstructed opening. This makes them an ideal solution for meeting Building Regulation requirements for emergency egress escape routes on upper floor bedrooms.
We recommend providing overall manufacturing sizes—which is the exact frame size you require—whenever possible. If you are providing structural brickwork opening measurements instead, please make sure to let us know. In those cases, we will apply standard fitting deductions, usually deducting 10mm to 12mm from both the overall width and height, to determine the final frame size. Also, remember to clarify whether your measurements include additional components like cills, add-ons, or couplers so we can calculate your quote accurately.
Powder-coated aluminium requires minimal maintenance. Clean frames at least twice a year (or every 3 months in coastal or industrial areas) using warm water with a mild non-alkaline detergent and a soft cloth. Apply light machine oil to moving locking parts once a year, and avoid using abrasive cream cleaners, bleach, solvents, or WD-40.
When requesting a quote, we always recommend providing overall manufacturing sizes – which is the exact frame size you require—whenever possible. If you are providing structural brickwork opening measurements instead, please make sure to let us know. In those cases, we will apply standard fitting deductions, usually deducting 10mm to 12mm from both the overall width and height, to determine the final frame size. Also, remember to clarify whether your measurements include additional components like cills, add-ons, or couplers so we can calculate your quote accurately.
Get your Window Quote
Ready to price up your project? Fill in your details in the contact form or drop your window requirments straight over to us. Whether you’re a trade professional or a DIY homeowner, our team will sort a free fully itemised quote for you.
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