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How to Fix Common Bi Folding Door Repair Problems Bi folding doors let in more space and create seamless connections between indoor and outdoor areas. In time, they will start to wear out and require repair. There are many solutions to fix your bi-folding doors. Here are some of the most common issues and their fixes: Misalignment. could be the reason of the bi-folding doors being in a position to seal properly, or creating drafts inside your home. This can be due to the frames moving in different climates or normal wear and tear o