Box Sash Regal Windows

 (Cords & Weights Sash Windows)

Our high-specification JELD-WEN box sash windows provide a direct replacement for original box sash windows or creates a traditional look for a new build. The weights and pulleys system makes them ideal for replacing an existing box sash window.

Invest in Classic Style with Our Box Sash Range

Keep the original charm and allure of your period property intact whilst improving your window performance. Our JELD WEN Sash Windows range earned its name for its luxury aesthetics. Made to measure with premium timber and exuberant materials, there’s a minimum and maximum size available – but these can be 2400mm wide and 2600mm high – truly huge, but fairly normal in areas of London. This creates some room for us to tailor our Box Sash windows for your project.

Stylish, expertly crafted and FSC certified, these are a solid investment for your project. With engineered softwood used in the core and frame, this range doesn’t dip in performance. Low U-Values are achieved with double and single glazing options available.

Our team of fully trained surveyors will provide a full survey to ensure you get the perfect fit. We will work with you to arrange the supply and installation to meet your projects requirements.

Want to know more about Box Sash Windows?

Visit our box sash windows FAQs page, or get in touch and our friendly team can help with any queries you have.

Get a Quote Today!

Use our quick quote form to get an estimated cost today. Manufactured here in the UK, we also offer free & fast delivery to all addresses on the UK mainland!

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Why Choose a Box Sash Window?


If you have an original box sash window that needs replacing, the true pulleys and weights system in our Traditional Box Sash range is an ideal candidate.

Classic Luxurious Style

Our Traditional Box Sash windows online offerings are a classy window design option, adding some flair to the details of your home’s design.

Fully Guaranteed

Long and comprehensive guarantees mean the quality of your purchase is assured.

Product Information

  • Wide range of U-values available
  • Long guarantees against rot and fungal decay
  • Made-to-measure with minimum and maximum size
  • Frame depth from 140mm through to 180mm to take triple glazing options ( standard frame is 148mm)

Our Box Sash Window range come with true pulleys and weights systems, making them an ideal option for replacing an existing sash window. Available with double and single glazing, each one comes with a black warm edge spacer bar as standard. Premium timber and exuberant materials used throughout the range. And a wide choice of hardware styles and colours to meet your specific needs.

With size customisation, these windows also come fully finished in a Hi-Build paint system with a never ending range of colours to choose from too.


  • Horns on sashes as standard
  • Factory glazed windows as standard – but with a wide range of U values available.
  • FSC certified materials used as standard

Have a Question?

If you would like some expert advice and insight to our Box Sash Window range, or any of the other ranges and products we offer, then please get in touch and we’d be happy to help!


01205 363 999