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Bi Fold Door Repairs Bi fold doors can be difficult to operate if the hardware is damaged. The hinges at the top and bottom rollers are the most common components that can be damaged and require maintenance or replacing. The door track can also be blocked by dust and dirt, resulting in it sticking. It is easy to fix this issue by cleaning and taking out the dirt. Fixing the hinges Bi-fold doors can open rooms in a stunning way. However, they do come without a few challenges. The hi