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How to Fix Common Bi Folding Door Repair Problems Bi-folding doors provide an effortless transition between indoor and outdoor spaces. However, as time passes, they may begin to fail and require repair. There are a variety of ways you can repair your bi folding doors. Here are and solutions: Misalignment. Misalignment Misalignment may be the cause of your bi-folding doors not being capable of sealing properly, or causing drafts to your home. This can be caused by the frame's movement due to different climates or the