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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 areas. As time passes, they may begin to wear out and require repair. Luckily, there are many ways you can fix your bi folding doors. Here are a few common issues and their fixes: Misalignment. Misalignment A misalignment could be the reason of your bi-folding doors not able to seal properly, or creating drafts in the home. This can be caused by the frame's movement d