Vertical sliding sash windows manufactured using Spectus uPVC profileSuppliers of Kömmerling uPVC sliding sash windows across Stockport, Manchester and Cheshire

If your customers are looking for a traditional, vertical sliding sash window, our uPVC box sash windows will be a better fit. Our Victorian and Georgian style windows maintain the authentic look by incorporating deep bottom rails, decorative horns, and contoured astragal bars into their designs.

Features of our uPVC sash windows

  • 128mm front to back frame depth with a 150mm integral cill
  • High quality glazing ensures WER standards are met every time
  • Fitted with Caldwell spiral balances
  • Special reinforcing steel and anti-jemmy bar
  • White, Cream, Ash, Golden Oak, and Rosewood timber effect frames

Our vertical Kommerling uPVC sliding sash windows provide a strong secure build with incredibly low maintenance. Thanks to the innovative anti-jemmy security bar, it is one of the most secure vertical sliders available. For more information about our high-quality products, contact us today and one of our glazing experts will be in touch.

Our vertical sliders are available in a range of woodgrain effect finishes, and they can also be coloured in any RAL colour. For the finishing touch, your customers even have the choice of five different finishes for ancillaries. Get a quote within 1 hour!

Installation guide: How to toe and heel windows and doors 

Colour Options

  • White


  • White Woodgrain

    White Woodgrain

  • Cream


  • Rosewood


  • Rosewood on White

    Rosewood on White

  • Oak


  • Oak on White

    Oak on White