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How to Fix Common Bi Folding Door Repair Problems Bi folding doors let in more space and create an unbreakable connection between outdoor and indoor areas. In time, they will begin to wear out and need repairs. There are several ways to fix your bi-folding doors. Here are some common problems and their fixes: Misalignment. Misalignment A misalignment could be the reason of your bi-folding doors not being able to seal properly, or causing drafts in