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Bi Fold Door Repairs Bi fold doors can be difficult to operate if the hardware is damaged. The hinges on the top and bottom rollers are the most common components that are damaged and require repair or replacing. The track of the door can get blocked by dirt and dust, resulting in it sticking. It is simple to fix this problem by cleaning and removing the dirt. Fixing the hinges The bi-fold door can be an excellent way to open up an area. They are not witho