Traditional Style. Modern Living
Sliding sash windows combine classic style with modern performance, featuring two vertically sliding panes for natural ventilation.
They replicate the elegance of traditional timber sashes while offering improved insulation, security, and low maintenance.
Down To The Core
Built to withstand the demands of the British climate, these uPVC sliding sash windows deliver excellent weatherproofing, thermal efficiency, and security. Multi‑chambered frames with argon‑filled double glazing help minimise heat loss.
Advanced locking systems and reinforced components provide added peace of mind, ensuring long‑lasting performance and everyday comfort.
The Benefits That Matter Most
- Durable, low‑maintenance construction
- Secure locking systems with child safety features
- Timeless heritage appearance with customisable detailing
- Energy‑efficient double glazing with draught‑reducing seals
- Easy‑clean tilt‑in panes with smooth, reliable sliding operation
Customised Style, Inside and Out
Our sliding sash windows offer a wide range of styles and finishes, allowing you to tailor the look to suit your home. From classic colours and wood‑effect finishes to traditional detailing and quality hardware, every element can be customised for a perfectly balanced, authentic finish.
Classic Range, Modern Choices
Our beautifully designed sliding sash windows combine classic character with modern performance. Energy efficient, low maintenance, and available in a wide choice of colours and finishes, they’re designed to complement any architectural style and help you achieve the perfect look for your home.
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Slide Into Timeless Style
To find your perfect sliding sash window, or to learn more about our supply-only range, simply enter your details below, and our casement window experts in one of our nationwide branches will be in touch.
You can also call 0800 22 77 77, email help@nationalplastics.co.uk or access our live chat.