A beautiful and exclusive sash window collection to grace your home.

If you believe, like us, that sliding sash windows are the most beautiful window style of all time, you're sure to appreciate our elegant yet pioneering designs.

As a company, we devote our time to reproducing traditional features, as faithfully as possible in modern materials.

This means our uPVC box sash windows are likely to exceed your expectations of 'timber alternative' sash windows.

Our modern components and traditional designs allow you to enjoy the warmth and security of modern windows, whilst preserving the character, charm and period beauty of your home.


These sash windows are only sold through our national network of premier partners, all of whom are certified and approved Bygone sash window installers




Locate your nearest premier installer for a free quote


Accreditations >

Learn why you get better windows because of these

  • BBA
  • urs
  • sbd
  • ce
  • tgo

Schedule a Design Consultation

Would you like to see a sample, discuss your requirements and options, or obtain an assessment of the costs for your project?

Please click on the button below and enter your details. An approved local installer will happily discuss your request and help assess your project.


If you would like a copy of our brochure please click the download button at the bottom of this page.