Series 90 Heavy Duty Vertical Sliding Secondary Glazing  


A heavy duty vertical sliding system operating with specialist balances that allow large and weighty panels to operate with ease. It is used to treat large sash windows often found in Victorian and Edwardian buildings. 

  • Frame width 2000mm
  • Frame height 3600mm
  • U-value 2.62W/m2K (6 - 12mm standard glass with timber primary window)
  • dB reduction 44dB (Rw) (6-6.4mm glass with 100mm cavity)
  • Security accreditation Secured by Design (accredited police preferred product) (intruder) ISO 16933 EXV 33 (blast)