uPVC Sliding Sash Windows

Practical and stylish, our vertical sliding sash windows combine modern PVCu technology with triple glazing, making an excellent choice for replacement windows.

For a traditional appearance, sliding sash windows can be fitted with Georgian bars and come with a choice of colour and finish including optional decorative horns.


  • The REHAU Heritage system has been stylishly designed to replicate the slim sight-lines and traditional styling details of timber sash windows found throughout the UK and Ireland.
  • Authentic looking sash windows with modern uPVC finishes
  • Suitable for conservation areas or where restrictions on replacement windows apply
  • Low maintenance windows that never need to be painted and won’t rot or peel
  • Vertical sash windows slide up and down effortlessy, and tilt inwards for easy cleaning
  • Windows can be double glazed or triple glazed and can achieve an ‘A’ Window Energy Rating (WER)
  • Window and door furniture options in brass, chrome, brushed chrome, white or black

Run-thru sash horns

Run through sash horns

Our Rehau Heritage sash windows are widely recognised as the most authentic looking sash windows available.

Featuring exclusive run through sash horns, we can replicate a traditional timber window so that it is essentially identical to the original style.

Until recently, uPVC sash windows were manufactured with a “bolt on” horn but this can be clearly seen as an added piece.

Since our run through horn is seamless, it helps to maintain the integrity of the building while giving the aesthetics of traditional timber windows.


Sash windows are available in various standard colours – classic PVC White, Rosewood, Golden Oak and Mahogany woodgrain.

We can also offer a choice of 19 special woodgrain and colour laminate options available to order, including Anthracite Grey, Cream, Schwarzbraun (black/brown) and White Ash.
Further colour options are available from the unique REHAU Acryl II offering you a choice of 150 different RAL colours.

Georgian Bars

Our Georgian astragals are known to be the most authentic replication of the original astragal on a PVCu double glazed window.

Georgian bars (also known as plant-on or glazing bars) add authenticity to our doors or windows giving them the traditional Georgian appearance of individual panes with the modern benefits of uPVC. They are available in white or woodgrain foils and a variety of colours.

Georgian bars inside outside