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How to Fix Common Bi Folding Door Repair Problems Bi-folding doors allow for an effortless transition between indoor and outdoor spaces. However, as time passes, they can start to wear out and require repair. There are plenty of ways to fix your bi folding doors. Here are some of the most common issues and their fixes: Misalignment. Misalignment Misalignment may be the cause of your bi-folding doors not being in a position to seal properly, or creating drafts in the home. This could be du