Sash Window

Timber - Sliding Sash Window

Our vertical sliding sash timber window system is from our Scandinavian product family. Although designed for projects where conservation and surrounding buildings are key factors, it utilises the same impressive methods of production and engineered timber profiles to ensure performance, longevity and quality. Whilst traditional in style and sympathetic in looks our sliding sash window incorporates many modern qualities, including a built in tilt function to the sashes. A clever design ensures when opening the window the sashes are separated, thus avoiding wear on the weather strips. On closing the window the sashes meet and compress the weather seals for ultimate protection against harsh conditions.

Features & Benefits:

Profile & Appearance

  • Manufactured from slow grown engineered knot free pine, class A1-A3.
  • No visible finger joints in timber.
  • Suitable for conservation areas and sympathetic to the environment.
  • Traditional appearance with pattern/beaded internal profile.
  • Supplied factory assembled, finished & glazed.

Thermal Efficiency

  • Double glazed
  • Overall U-Value of 1.4W/m2K.
  • Acoustic performance tested at Rw=33dB. Further upgrades available.


  • Max size 1200 x 2200mm.
  • Windows fitted with torso balanced springs and sash hooks.
  • Both sashes have a tilt function for ventilation and easy cleaning from inside.
  • Top sash can be fitted with decorative horns to the lower corners for a more traditional look.
  • Maximum sash weight is 35kg.
  • Hardware - Caldwell Time-A-Tilt.

Wide Range Of Finishes

  • Class A1-A3 engineered slow grown timber - No wood¬†knots, no visible finger joints.
  • All timber parts are vacum impregnated using GORI treatment prior to finishing.
  • None toxic water based finishes only.
  • Choose from over 200 RAL paint colours.
  • Wood stain finishes also available.
  • Dual colour finish available (different internal and external colours).
  • Marine protection available.