Sliding Sash Windows

Replicate the authentic appearance of traditional vertical sliding sash windows – only without the drawbacks

The sliding sash window by Kömmerling has been designed to not only replicate the appearance of traditional timber sash windows but also to simplify their replacement.

This includes a 128mm outer frame, designed to match timber sash dimensions making installation straightforward and trouble-free.

Additionally, ovolo detailing on the frame, bead, sash and cill, deep bottom rail, sash horns and Georgian bar options, give the Kömmerling sash window impressive design flexibility.

With ultra-smooth operating balance mechanisms and flexible tilt-in features for ease of cleaning, it remains a highly popular choice for period property owners.


  • Optional Georgian bars, sash horns, weather bars and deep bottom rail options provide additional period authenticity
  • Flush gaskets replicate traditional glazing
  • Tilt and travel restrictor options are available
  • Windows can be made up to a maximum size of 1500mm wide and 2500mm high
  • Fitted with Caldwell spiral balances
  • The use of large and small sash profiles give equal sightlines to top and bottom sashes
  • Reinforced with sturdy galvanised steel
  • 150mm and 210mm cill options
  • WER standards are met every time with a high quality of glazing
  • Pile seals between sash and outer-frame prevent draughts
  • White, Cream, Golden Oak, and Cherrywood timber effect frames
  • Trickle or glazed in vents

Colour Options