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Sliding Sash Windows

  • WER to Band A+
  • U-value to 1.3W/m2K
  • Thermal inserts using recycled composite materials
  • 24mm double glazing as standard
  • Innovative dedicated weather bar
  • 10-year manufacturing guarantee
  • Energy rating of 'B' as standard
  • High security upgrade package available

Period style, authentic detail

The sliding sash window combines perfect proportions, period details and traditional techniques. Both frames and sashes can be mechanically jointed, avoiding the ‘giveaway’ mitred weld of PVC-U. Our new Legacy PVC-U sliding sash windows hold a host of impressive features that not only add to its good looks but also enhance the performance of the product as well as ease of fabrication and installation.


Sliding Sash Windows Explained

Sliding Sash Windows are engineered to insulate and keep homes protected from the elements.

24mm double glazing is standard, and for exceptional energy efficiency, the multi-chambered sections can be enhanced with the addition of purpose-made recycled thermal inserts.

Pile seals to the sash and outerframe prevent the draughts that are common with timber frames and features like our optional, dedicated weather bar add another level of defence against rainwater. These frames are durable, tough, resistant to the forces of nature and need next to no maintenance.

We use the very best hardware, including top-of-the-range machinery, which makes our hand-built sliding sash windows a true replica of the heritage sash windows they could be replacing.

Sliding Sash Window Options

Our windows can be fully mechanically jointed, achieving the appearance of a timber frame’s construction. Foiled finishes give the option of textures and period colours – the appearance has been nailed. Add to that our durability, security and energy efficiency and you’ve got a very persuasive argument.


Light Oak

Black Brown

Anthracite Grey





Agate Grey

Pebble Grey

Sage Smooth

Chartwell Green

Dark Green

Steel Blue

Dark Red

Hazy Grey Finesse

Kensington Grey

Buckingham Grey

Basalt Grey Smooth

Slate Grey Finesse

Slate Grey

Anthracite Grey Smooth

Black Ulti-Matt


Irish Oak

Honey Oak Super Matt

Swamp Oak

Silver D Smooth


Flemish Gold Smooth

Download a Sliding Sash Window Guide

View more benefits, styles, colours and much more.


Sliding Sash Windows Benefits

Safety restrictors

When sprung outwards, they prevent sashes opening more than a set amount. Turning the key retracts and secures the stops allowing the sashes to slide past and open fully.


Trickle ventilation units have a slide-open-and-closed operation. Take care not to damage the unit when sliding the bottom sash up.

Your Next Steps

Why choose us
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Got a question? Call us on 0116 403 0279

You can also email our team of experts on enquiries@customtradesystems.co.uk

Copyright 2023 Custom Trade Systems Ltd, All Rights Reserved. Registered in England & Wales No. 13185588 | VAT No. GB 437148488

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