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How to Fix Common Bi Folding Door Repair Problems Bi folding doors open up the interior space and create a seamless connection between outdoor and indoor areas. However, with can start to wear out and require repair. There are plenty of ways you can repair your bi folding doors. Here are some common problems and their fixes: Misalignment. Misalignment Misalignment may be the cause of the bi-folding doors being able to seal properly, or causing drafts in the home. This can be due to the