JELD-WEN Regal Box Sash Windows

JELD-WEN’s Regal box sash windows provide a direct replacement for original sash windows. Using a traditional mechanism but offering enhanced energy efficiency with double glazing, Regal box sash windows combine charm and performance.

JELD-WEN Regal Box Sash Windows

JELD-WEN Regal box sash windows are designed to be the perfect sash window replacement. If you have an older home with original sash windows which are in need of replacing, you will want a window which is true to the authentic character of your property. JELD-WEN sash windows use a traditional cords and weights system to ensure a like-for-like replacement. What’s more, you can also pick from a variety of bar designs, colours and finishes to ensure your new windows suit your property perfectly.

All JELD-WEN windows are focussed around offering high performance, as well as beautiful craftsmanship. As such, JELD-WEN sash windows can be double glazed to offer enhanced thermal insulation and better U values. Should your home be listed or subject to building restrictions, single glazed options are also available. 

Questions about box sash windows? Read our helpful box sash windows FAQs here.

JELD-WEN Timber Sash Windows

JELD-WEN windows earned their name thanks to their reputation for premium products. Their wooden box sash windows are FSC certified and have an engineered softwood core – making the most of timber’s natural insulation. Regal box sash windows come in standard sizes but can also be made to measure to fit nearly any window opening. With JELD-WEN’s windows manufactured in Britain, you can expect unbeatable quality and rest assured they meet all UK standards and regulations. 

If you are interested in JELD-WEN Regal box sash windows, contact our team today. We’re happy to help with any questions and enquiries.

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

  • Materials: engineered softwood
  • Bar designs: no bar, Victorian bar, marginal bar, vertical bar, all bar
  • Sash horns: available
  • Colours: any RAL colour available
  • Hardware options: polished gold as standard, chrome also available
  • Security options: no additional security options currently available
  • Ventilation: recessed flush fitting vents as standard

Our JELD-WEN Regal box sash windows come with a true pulleys and weights system. Windows come with a black warm edge spacer bar as standard. Premium, FSC certified timber is used throughout the range.


  • Window sizes: made to measure
  • U value: 1.5W/M2K (double glazing)
  • Glazing options: double glazing 24mm Low-E as standard, single glazing available
  • Sill size range: standard 148mm sill, with the sill flush with the face of the box case
  • Factory glazed windows as standard, with a wide range of U values available dependant on glazing choice

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