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Bi Fold Door Repair - How to Fix Leaning Doors Without Removing the Hinges Bi-fold doors are a fashionable and practical method to connect your outdoor and indoor areas. But, like every other door system, they need to be maintained in order to function correctly. This can be done by cleaning and lubricating all mechanisms including the lock to ensure that they function smoothly. This will help avoid issues that could cause them to fall or become misaligned. Fix a Door that is Leaning It is possible for a door to lean, creating gaps between the