Optio BSF70 HI Bi-fold Door


Folding Doors


Welcoming, stunning, practical.

An intelligent combination of form and function, our highly versatile and market-leading Bi-fold sliding door system gives you maximum control over the style and operation of the doors.

Multiple panels can be added to accommodate the design specifications of your building, with the option to open in or out as required. The system also boasts a unique flush line pop-out handle that allows for square flush stacking panels when doors are fully open.


Design features

  • Certified under the Secured By Design scheme
  • Tested to PAS 24
  • Unique, pop-out handle that allows for maximum door opening and panels to stack square
  • Four stainless style rollers to ensure smooth and consistent operation


  • Chamfered and square bead options
  • Glazing 28mm – 40mm
  • Available in a range of opening configurations
  • Available with heavy duty rollers; BSF70 HD
  • Available in a range of single or dual colour and anodised finishes
  • QuiK Clip bead available with 28mm glazing
Uw value W/m²K (Double glazing) : 1.6 W/m²K
Uw value W/m²K (Triple glazing) : 1.4 W/m²K
Uf value W/m²K : 2,7-3,4
AWW Classification : 4 / 9A / AE2400
Size limits
Max sash width (mm) : 1200
Max sash height (mm) : 3000
Inward opening : X
Outward opening : X
Multi-point locking : X
Dual color option : X