Sliding Sash Windows
Sash Windows of the Highest Quality
Sash windows bring a timeless elegance and a sense of heritage to any property, whether it’s a grand country estate, a period home or a contemporary townhouse. With two vertically sliding glazed frames known as ‘sashes’ , set within a traditional outer frame, they are admired for their distinctive proportions and graceful, classic design.
Our sash windows are crafted to offer the ideal balance of traditional styling, smooth functionality and modern energy efficiency. This makes them an excellent choice for both sensitive restoration projects and high‑quality new build developments.
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
Many of our windows can be finished using our in‑house, high‑performance three‑coat spray system, should you choose this option. Each selected component is fully end‑grain sealed and can be finished in any RAL or translucent colour, with dual‑colour combinations available to suit both interior and exterior design schemes.
For added convenience and reassurance, customers can also opt for factory‑fitted glazing and high‑specification locks and ironmongery from leading hardware manufacturers. These premium components ensure smooth, secure and reliable operation, enhancing long‑term performance.
As energy prices continue to rise, more homeowners are seeking higher‑performing, energy‑efficient glazing – particularly in older properties. To support this, we offer a range of advanced glazing options including Vacuum Insulated Glass (VIG), 12mm heritage units and 24mm double‑glazed units (DGU).
Tailored for Every Home
Our sash window range includes a selection of bespoke options, each tailored to complement the unique character of your property:
Traditional Box Sash – A classic design featuring traditional weights, cords, pulleys and pockets – ideal for period homes and heritage restorations.
Spring Balance Sash – A modern alternative that uses spiral or spring balances, offering smooth operation while maintaining a traditional appearance.
Heritage Sliding Sash – Crafted to match or remain in keeping with existing windows, making it suitable for conservation projects and sensitive refurbishments.
Yorkshire Sliding Sash – A distinctive horizontal‑sliding design traditionally found in cottages and rural properties.
PAS24 Certified Sliding Sash – A high‑security option that meets PAS24 standards, combining classic sash styling with enhanced protection and modern performance.
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