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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 seamless connections between outdoor and indoor areas. However, as time passes, they can start to fail and require repair. Luckily, there are many solutions to fix your bi folding doors. Here are some of the most common issues and their fixes: Misalignment. Misalignment If your bi folding doors are difficult to open or close creating drafts in the house or not sealing correctly The issue could be caused by misalignment. Th