The Bygone Sash Window is the UK’s most advanced sash window system. Our exclusive sash windows combine attention to detail and exceptional build quality, with an unprecedented 12 year guarantee.
“Virtually indistinguishable from timber originals”, the quintessential sash window is as perfect for authentic period conservation and restoration, as it is for thermally efficient new build period reproductions.
If you believe the box sash style of window remains the most beautiful window of all time, you’ll appreciate our elegant yet pioneering designs. Faithfully reproducing traditional features like chamfered putty line sashes, staff beads, slim meeting rails, and butt joints, places Bygone windows in a league of their own.
Beautiful and Authentic Victorian Features
When horns became fashionable during the Victorian period, they like the deep bottom rails were made with vertical “mortice and tenoned” joints, the same is true for Bygone Harmony sash windows.
With their Timberweld technolog, a market-leading construction method to create flawlessly sealed joints; perfectly replicating the beautiful aesthetics of mortise and tenon timber butt-joints, with the strength and durability of a traditional weld.
Along with a grained, textured, acrylic wood foil you can be certain that your new sash windows will have a perfect, authentic sash window appearance, because most people when they first touch the highly defined grain, cannot believe it’s not wood