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How to Fix Folding Door Repair Problems Bi-folding doors provide an effortless transition between outdoor and indoor spaces. However, with time they can start to break down and require repair. There are plenty of ways to repair your bi folding doors. Here are some common problems and their fixes: Misalignment. of your doors could be the cause of the bi-folding doors being capable of sealing properly, or causing drafts inside your home. This could be due to the fra