Aluminium Casement Windows
Slim, strong and modern — with larger areas of glass and more light
Aluminium casement windows are a premium choice for homeowners who want slim sightlines, strength and a clean contemporary finish. Sumner Windows supplies and installs aluminium casement windows across Kent and the surrounding region.
Because aluminium frames can be slimmer than many alternatives, they allow for larger areas of glass and improved natural light — ideal for modern homes, extensions, open-plan living spaces and properties where design is a priority.
Aluminium is highly durable and the powder-coated finish retains its colour and appearance for many years with minimal upkeep. Thermally broken frames and efficient glazing help reduce heat loss and improve comfort.
Why choose Aluminium Casement Windows
- Slim sightlines and larger glass areas
- Exceptional strength and durability
- Long-lasting powder-coated finish
- Strong thermal performance with thermally broken frames
- Very low maintenance
Engineered for performance
- Fixed, side-hung, top-hung and tilt-and-turn options
- Flush casement options available
- Thermally broken aluminium frames
- Wide powder-coated colour range
- Single and dual-colour finishes
Configurator
Mix and match colours, hardware and glass to suit your home.
Available finishes
Choose your style
- Side-hung casement
- Top-hung casement
- Tilt-and-turn
- Fixed light
- Flush casement
Glass options
- Standard energy-efficient double glazing
- Solar-control glass
- Acoustic glazing
- Triple glazing on request
Furniture & hardware
- High-security multi-point locking
- Modern lever handle options
- Single or dual colour finishes
Engineered to protect
Security is built in as standard, with strong frames, modern multi-point locking and quality hardware. PAS24-rated and enhanced-security options are available where required, giving you peace of mind as well as improved comfort and kerb appeal.
Tailored to your home
We help you choose the right frame style, colour, glazing and hardware to suit your property and budget. Dual-colour options are available on many styles, allowing a different finish inside and out.
Property suitability
Ideal for modern homes, extensions, open-plan living spaces and properties where slim frames, large glazing and contemporary design are a priority.
How we fit it
From your first enquiry to the final installation, Sumner Windows looks after the whole process. We start with a free site survey and accurate measurements, help you choose the right style, colour and glazing, then fit your new windows with our own experienced installers. Interiors are protected throughout and all waste is removed, leaving you with a clean, finished result.
Frequently asked
Why choose aluminium over uPVC? +
Are aluminium windows energy efficient? +
What colours are available? +
More Aluminium Windows
Like the Aluminium Casement Windows? Let's talk.
Free site visits across Kent and London — get in touch to discuss your project.