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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 indoor and outdoor areas. As time passes, they may start to wear out and need repairs. There are a variety of ways to fix your bi-folding doors. Here are some common problems and solutions: Misalignment. Misalignment Misalignment may be the cause of the bi-folding doors being capable of sealing properly, or causing drafts to your home. This could be due to the movement of t