Invite nature into your living or working space
Concept Folding® 77 combines high insulation and comfort with maximum transparency and aesthetics. The aluminium sliding folding door optimises your way of living by drawing the exterior into your home or office, whilst maintaining maximum usage of existing space.
This high performance bi-fold door offers different openings, both inward and outward, to meet all possible requirements. As well as the standard folding door, CF 77 can feature a main door principle, in which the first leaf is used as an entrance door without affecting the other folding leafs.
CF 77 sliding folding door is available in 4 different thresholds, from high performance to low and even a flush threshold, in order to perfectly match all comfort and aesthetic requirements. Additionally, the CF 77 bi-folding door can be combined with the CS systems for windows, doors, and curtain walls.
CF 77 is available as a functional slim line sliding door, CF 77-SL. This variant features a slimmer visible profile width, an innovative and aesthetically pleasing aluminium sliding door.


  • Min. Visible width T-profile89 mm
  • Visible width meeting section144 mm
  • Max. height vent3000 mm
  • Max. width vent1200 mm
  • Max. weight element120 kg
  • Overall system depth frame77 mm
  • Overall system depth vent77 mm
  • Rebate height14 mm
  • Visible height vent97 mm
  • Min. Glass thickness6 mm
  • Max. Glass thickness63 mm
  • Thermal breakFibreglass Reinforced Polyamide Strips


  • Air Tightness max. test pressure (600 Pa)
  • Water tightness9A (600Pa)
  • Wind load resistanceB3 (1200Pa)
  • Acoustic performanceRw (C; Ctr) = 34 (-2;-5) dB / 45 (-1;-5) dB, depending on glazing type dB


  • Burglar resistance RC2/WK2 – PAS24