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How to Fix Common Bi Folding Door Repair Problems Bi folding doors allow for the expansion of the interior space and create an unbreakable connection between outdoor and indoor spaces. In time, they will be worn out and require repair. There are many solutions to fix your bi-folding doors. Here are a few common issues and solutions: Misalignment. Misalignment If your bi folding doors are a challenge to open or close, causing a draft within the home or not sealing correctly, the problem may be due to an