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   Spectus Vertical Sliders


Modern technology meets traditional craftsman.

Spectus Vertical Sliders really do hit the spot when it comes to the traditional appearance. Spectus windows are a revolutionary PCV–U sliding sash window designed to recreate a timeless elegance timber look.


When Spectus set out to design a sliding sash window, they knew they had to make something really special. Their Vertical Slider had to have the authentic appearance of a timber sash but none of the drawbacks. It had to be better than the original. We’re pleased to say we’ve done it, but don’t just take our word for it: the Spectus Vertical Slider is widely regarded as the best PVC-U sliding sash window there is.


Many people who live in listed buildings and conservation areas have to endure cold and drafty old windows or pay the costly expense of replacing timber windows that are much more expensive than an equivalent PVCu window. As our windows come with all the benefits of a modern 'A' rated, low maintenance window, any home will instantly feel warm and cosy.


Key Features


  • Compatible with off the shelf hardware
  • Customisable to meet the highest security standards
  • Wide choice of colours and woodgrain finishes
  • Trickle or glazed in vents
  • Standard or fully reinforced to Spectus recommendations.



  • Authentic ovolo shape to the frame, bead, sash and cill
  • Optional Georgian bars, sash horns, weather bars and a deep bottom rail designed specifically to provide that period look
  • Flush gaskets mimic traditional glazing
  • Approved by many planning boards, even for use in conservation areas.

Available foiled colours:



  • A 128mm outerframe matches timber sash dimensions
  • Windows can be made up to a maximum size of 1600mm wide and 3000mm high
  • Large and small sash profiles give equal sightlines to the top and bottom sashes
  • 150mm and 210mm cills
  • 10mm/20mm/50mm frame packers.

Energy Efficiency


  • Designed to achieve a Window Energy Rating of Band ‘A’ with 24mm sealed units
  • Draughts prevented with pile seals to the sash and outerframe.



  • Both sliding sashes can tilt inwards for easy cleaning
  • Smooth operating balance mechanisms.




Irish Oak

Light Oak





Call us to arrange to see these colour swatches in person 01253 681202


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Phone: 01253 681202  /  07930 330838