Vertical Sliding Sash Window System

Product features

  • U-values as low as 1.4 W/m²K
  • Acoustics up to 37 dB
  • Choice of 24, 28, 36, 40 and 44mm glazing options
  • Mechanically jointed deep bottom rail option
  • Whether bar and Georgian Bars options
  • Run-through or screw-on horn options
  • Secured by Design approved
  • PAS 24 as standard
  • Description

    Our Vertical Sliding Sash Window System remains at the forefront of the industry today because its classic good looks enhance heritage properties and add understated style to modern ones.

    The market leading Vertical Sliding Sash Window System has all the features of a traditional box sash timber window and is widely accepted for use by conservation officers in heritage and listed buildings. It offers all the safety, security and thermal efficiency benefits of a modern-day PVC-U window with a choice of welded or mechanically jointed options.

    Every detail has been considered and the result is a window that offers outstanding authenticity and thermal performance with no compromise.

    Base Colour Complementary Range

    ↓ Click on colour base name to view complementary foils

    Black Ulti-Matt*

    Silver D Smooth*

    Hazy Grey Finesse

    Kensington Grey

    Buckingham Grey

    Basalt Grey Smooth

    Slate Grey Finesse

    Slate Grey

    Anthracite Grey

    Anthracite Grey Smooth



    Pebble Grey*



    Agate Grey

    Chartwell Green

    Irish Oak*

    Honey Oak Super-Matt*

    Light Oak



    Swamp Oak*


    Black Brown

    Flemish Gold Smooth*


    Dark Red

    Steel Blue

    Dark Green

    For details on our full range of colours, please get in touch with one of our team. All colours and imagery shown are for illustrative purposes only. Please refer to an Epwin Window Systems colour swatch for a more accurate representation of finishes. Not all products are available on all substrates. Please refer to our PVC-U Systems colour guide. Colours and substrates are subject to change. RAL numbers are quoted to the nearest match.

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