uPVC Casement Windows
Energy-efficient, low-maintenance casement windows in a wide choice of colours
Sumner Windows supplies and installs high-quality uPVC casement windows across Kent and the surrounding region. Casement windows remain one of the most popular choices for UK homes because they are practical, secure, attractive and suitable for almost every property style.
Whether you are replacing tired old double glazing, upgrading draughty timber frames or improving the energy performance of your home, our uPVC casement windows offer a reliable and cost-effective solution. They are designed to reduce heat loss, improve comfort and give your property a clean, fresh appearance.
uPVC is also very low maintenance — unlike timber it does not need regular painting, staining or treating. A simple wipe down is usually enough to keep the frames looking smart.
Why choose uPVC Casement Windows
- Reduced heat loss and improved year-round comfort
- Strong frames and modern locking for dependable security
- Low maintenance — no painting, staining or treating
- Wide choice of styles, colours and woodgrain finishes
- A cost-effective upgrade that improves kerb appeal
Engineered for performance
- Side-opening, top-opening, fixed and multi-light designs
- Larger feature window configurations
- Quality hardware and modern locking options
- Energy-efficient sealed double glazed units
- Smooth and timber-effect foil finishes
Configurator
Mix and match colours, hardware and glass to suit your home.
Available finishes
Choose your style
- Side-hung casement
- Top-hung casement
- Fixed light
- Multi-light
- Feature/bay window
Glass options
- Standard energy-efficient double glazing
- Toughened safety glass
- Obscured glass for privacy
- Acoustic glazing for noise reduction
- Triple glazing on request
Furniture & hardware
- Modern espagnolette multi-point locking
- Choice of handle styles and finishes
- Trickle vents where required
- Restrictor and child-safety options
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 houses, traditional Kent cottages, family homes, extensions, bungalows and rental properties across Kent and the surrounding region.
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
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Like the uPVC Casement Windows? Let's talk.
Free site visits across Kent and London — get in touch to discuss your project.