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Folding doors are mostly known as bi folding door, mostly they have more than two panels. Some people also call it accordion doors like the musical instrument. Deren folding doors could be used as internal or external room divider made either by aluminum frame and glass or glass.

Most bifold doors need a bottom track to lead the door leaf.The door leaf route is folding through sliding track. Deren offer glass folding doors, aluminum frame folding patio doors in manual or control by automatics and also folding door hardware.

Deren folding doors with patented hidden hardware are suitable for balcony, patios,dining room, kitchens where less space but need a wider opening. Folding mode can be designed into:

·Full open type

·Unilateral full open type

·asymmetricc full open type

·Partial folding type