Bi Fold Doors

As Liniar fabricators we make the new purpose designed Bi-Fold Door

Bi-Fold Plus Doors

Revolutionary Design!


  • Concealed hardware – stainless steel track mounted in-board, only hinge knuckles visible when door is closed.
  • Low threshold options available, Part M compliant with mechanical joint moulding & standard 56mm outer frame.
  • Suitable for external & internal opening assemblies, both internally glazed, using only 2 main profiles.
  • Ease of manufacture, no welding of T’s into Z’s to produce interlocking frames, only 1 sash profile required.
  • Ease of installation, assembled panels can be installed in minutes using the patented retractable guide location.
  • Slimmer sight-lines on panel to panel joints.
  • 4-2-2 style of door can be manufactured.
  • Adjustable hardware in X & Y.
  • ease of access – outer frame can be supplied in component form for mechanically joining on site.
  • Standard Liniar glazing area uses common components with the sculptured window system.
  • 70mm deep outer frame enables butt-joining with doors or windows
  • Fully sculptured frames.
  • Secure shoot-bolt location into track using 35mm backset door gear.
  • Sealed, stainless steel ball bearing races, for smooth running
  • Snap-on ancillary products for outer frame – cill, frame extensions & 90 deg corner post.
  • Co-extruded sash glazing area.
  • Interlocks fitted to vertical panel joints for security.
  • Concealed outer frame fixings.
  • Patent & Registered Designs applied for.
  • Choice of white of foil finishes.
  • Choice of White, brass & chrome finish hardware.