The mechanism of bi-folding doors is often compared to the musical instrument, the ‘concertina’.
This reed produces sounds as mechanisms fold in on each other, and that’s exactly how bi-folding doors work!
Each door panel folds onto the next, allowing them to slide and stack neatly to one or both sides. They operate by sliding along a track, typically installed at the top and bottom of the door frame.
The design ensures that the doors can be opened fully, partially, or remain closed, providing flexibility in how the space is used.