Traditional Style with Modern Technology

Combining all the benefits of modern, thermally-efficient materials and the latest technology, with period style and aesthetics, our Vertical Sliding windows are a great uPVC alternative to more traditional wooden box sash windows. Thermal performance and security are built into the characterful and authentic appearance.


The Spectus Sash Window is A-Rated as standard, and comes with toughened safety glass. All our high-security sliding windows come packed with safe and practical features like travel restrictors, safety tilt restrictors, and an anti-jemmy bar at no additional cost, offering our customers incredible value for money.

What are Vertical Sliders?


The timeless design of a sash window is difficult to beat but timber sashes, particularly old ones, are troublesome and require regular maintenance. Spectus Vertical Sliders are designed to offer authentic, period looks without any of the hassle associated with real timber. The elegant proportions, with two sliding panes, also create very effective ventilation.


There are optional features like Georgian bars and sash horns, consistent with period windows, and ovolo detailing to the frame, sash, beads and cills. Simply put, they are beautiful sliding-sash windows with security built in, high thermal performance, and low maintenance. What’s more, they can achieve a high band of Window Energy Rating. Spectus Vertical Sliders combine grace and elegance, with the performance of modern materials and technologies.

Key Features of our VS Windows


Classic Colour Options



As with all our uPVC windows and doors, there is a huge range of beautiful colours and finishes to choose from.


These include the ever popular set of woodgrains and foils that help create realistic looking timber effect windows, colours that are often chosen for modern buildings like anthracite grey, and the more traditional whites and creams with a textured finish.

Spectus Sash Window Features


  • Panes that tilt inwards for ease of cleaning.
  • Child safety catches.
  • Reliable, easy-action balance mechanisms.
  • Energy-efficient double glazed panes.
  • Pile seals to prevent draughts.
  • Unobtrusive flush gaskets.
  • Secure locking mechanisms.
  • Range of colours & woodgrain foil finishes


Sash Windows by Spectus are guaranteed for 10 years and will not rust, rot, flake, or peel like a painted wooden window might.


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