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How to Fix a Bifold Doors Top Pivot Bifold doors are an excellent method of creating seamless transitions between outdoor and indoor spaces. But, as with all doors they will encounter issues from time to time. Fortunately, fixing a bifold door is fairly easy and not invasive. It usually involves loosening one screw and adjusting height. Fixing the hinges Bifold doors are an excellent method of opening up a room and letting more light. They can be moved to either side, or folded back into a frame.