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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. In time, they will be worn out and require repairs. There are a variety of ways to fix your bifold doors. Here are some common problems and their solutions: 1. Misalignment. Misalignment If your bi folding doors are a challenge to open or close creating drafts within the home or not sealing correctly T