Folding doors

Folding doors

A folding door, also known as a bi-fold door is the door that slides open, made from a series of panels that fold up upon the wall like a concertina.

Bifold doors can be fitted inside or outside your home, as a gateway to your backyard or greenhouse, or even as a way to split a larger room without losing out of space. So in terms of flexibility, this is the best choice!

System 4500 folding doors

The REHAU System 4500 Bi-Fold Door Design is a premium solution for spaces that need a wide, unobstructed opening. It can be an option to link and slide patio doors, but can also be used to accentuate open-plan living for your architectural design.

Whether for residential or commercial installations, this unique door design allows sash panels to fold to either indoors side , creating a wide opening without any interference. This versatile door design uses compression seal technology for superior sound, air, and water resistance.


  • Large glazing range of up to 1 3/8 in for improved energy efficiency and acoustical features.
  • Multiple locking points and compression seals all around the sash perimeter for water tightness, minimal air infiltration, security, and good sound insulation.
  • Large reinforcement chambers in the sash as large as 7 ½ ft high and 3 ft wide (up to 175 lbs).
  • High-definition polish for weather and stain resistance and ease of maintenance.

Test result
up to LC-PG25




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