Add light and space to a project

Contemporary bi-fold doors combine elegance with flexibility, allowing design of panoramic view wide-span door openings to create versatile spaces.

Bi-fold doors are precision engineered to the highest standards and available in a variety of finishes and folding leaf combinations. PVC-U door sashes slide along a thermally-broken aluminium top and bottom track system, designed to ensure years of trouble free service. Rigid aluminium tracks increase the structural strength and enable easy transportation, preventing excessive flex to ensure that the doors run smoothly, even on long spans with multiple leaf configurations. Bi-fold doors are energy efficient and easy to maintain once installed.

Key features

  • Bi-fold doors are supplied fully assembled for easy installation
  • Thermally-broken top and bottom aluminium tracks
  • High quality Siegenia gearing
  • PVC-U door frames available in a choice of single or dual colour finishes
  • Aluminium tracks and hinge covers available in silver, white or brown finish
  • Hardware and flag hinges available in white, polished gold or polished chrome finishes
  • Choice of door designs: open-in or open-out
  • U-value: 1.7 w/m2k
  • Choice of glazing bead styles: chamfered or sculptured ovolo
  • Doors are supplied unglazed
  • Choice of sill sizes: 85mm and 150mm
  • Trickle vents fitted to first and last door sashes (optional)
  • CE Marked
  • Guaranteed for 10 years
  • Sealing weatherstrips conceal unsightly gasket lines for a professional finish


Crystal offers a range of colour options and all of these choices are available in dual colour specification, eg Chartwell Green on outside faces and White on inside faces. All colours shown below are a guide. Before making your final decision please ensure you have seen a foil swatch. test



















bifold door


bifold door 2


Crystal Direct doors boast
huge benefits

  • Warranty

    Crystal's bi-fold doors are guaranteed for 10 years - giving you peace of mind

  • Energy efficiency

    28mm double glazed units, Argon glass and aluminium spacer bar for excellent energy efficiency

  • Security

    Shootbolt locking mechanism maximises security

  • Quality

    Doors are manufactured to the highest quality standards in the UK

  • Recycling

    End of life PVC-U products are given a new lease of life via recycling

Crystal directAccreditations

To find your local supplier use the search box below to get
a list of Crystal approved and Platinum partner
supplier locations
within your area.