Spectrum  smooth sliding SMART bi-folding doors are an ideal alternative to patio doors and suitable for both domestic and commercial applications. They allow homeowners to open up their home to the outdoors and make the most of their room with a view. Used commercially, they can create a glazed screen that allows in the maximum ingress of light in inclement weather, and will also easily glide to open up an entire wall in warmer weather.

With smooth sliding operation, these bi-folds slide effortlessly due to bottom fitted dual rollers running on a dual track. Opal Definitive offers a choice of opening configurations to suit any application. Choose to fold the sashes internally or externally, place the opening at the side so the sashes all fold one way, at one end, to create a single entrance door for easy access, or in the middle to give the option of a double door.

Bifold Door Colour Option

Our unrivalled colour range provides the perfect finish for every property. From contemporary urban apartments to traditional cottages.


SMART Bifold Door Features

  • Attractive, 132mm slim-line profiles offer reduced sightlines
  • Thermally broken system
  • Square or round profiles
  • U Value of 1.5 W/m2K (when using 1.0 centre pane)
  • Fabricated using mitred corners
  • Lock mechanism available with domestic style ‘lift up’ handle and an adjustable, one-piece keep
  • Single or dual colour, marine quality polyester powder coat as standard
  • Document L compliant
  • Grey, white and grey on white are all available from stock
  • All other colours available on request
  • PAS 24:2012 – available on request

Bi Folding Door Dimensions

  • Max Overall Height 2500mm (per sash)
  • Max Overall Width 1200mm (per sash)
  • Max Sash Weight 100kg
  • Frame Width 102.5mm
  • Frame Depth 70mm
  • Typical Sightline 132mm