Sliding Sash Windows

Sash Windows of the Highest Quality

Sash windows add timeless charm and a touch of heritage to any property, whether it’s a grand country estate, period property or a modern townhouse. Featuring two sliding glazed frames, known as ‘sashes,’ set within an outer frame, they’re celebrated for their distinctive and elegant design.

Our sash windows are manufactured for the perfect blend of traditional style, functionality and energy efficiency, making them ideal for both restoration projects and new builds.

Have a Project in Mind? Let’s Talk.

At Derwen Joinery, we believe every exceptional piece begins not with timber, but with a conversation. We are genuinely interested in your ideas, your questions, and the unique details that will make your project a perfect fit for your space. Understanding your vision is the most crucial part of our craft. Get in touch with us today to discuss your plans and let’s begin the journey of bringing them to life.

Material and Finish Specifications

With the application of our in-house, high-performance three-coat spray system, each window and component is end-grain sealed and finished in any RAL or translucent colour, with dual-colour options available.

For convenience and peace of mind all windows are supplied with factory-fitted glazing and high-specification locks and ironmongery sourced from leading names in the hardware industry which will ensure smooth, secure and effortless operation, enhancing longevity and reliable performance.

Rising energy prices have increased demand for higher-performing, energy-efficient windows especially in older properties paving the way for Vacuum glass (VIG), 12mm heritage and 24mm DGU.