Casement Windows

Where Craftsmanship Meets Performance

We manufacture a fully bespoke range of timber casement windows, tailored to suit a wide variety of properties, from traditional and heritage homes to contemporary new builds. Expertly crafted by our skilled joiners using carefully selected high-quality timbers, our casement windows offer the perfect balance of timeless design and durable performance, ensuring lasting quality for years to come.

Timber casement windows continue to be among the most popular window styles in the UK, with Derwen Joinery’s casement window range featuring three primary types set out below.

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.

Range of Casement Windows

Traditional Flush Casement – Perfect for window replacements in traditional properties and period renovations, offering genuine character and style.

Conservation CasementBuilt on the foundation of our flush casement design, this range meets conservation requirements without altering the character of a property. Whether you’re restoring a listed cottage or working within strict planning conditions, this range allows for visual consistency while quietly delivering modern standards of performance.

PAS24 Casement – Enhanced safety, Energy-efficient windows designed for new builds and change-of-use projects.

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