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Bi Fold Repairs - How to Properly Maintain and Repair Your Bi Fold Doors Many bi-fold doors can become difficult to open, and some may even begin to let in drafts. This is usually due to the hardware falling out of alignment with time. It's generally fairly simple to get your bi fold doors back on track. It only takes a few adjustments. Misalignment Bi fold doors are beautiful homes, offering a wide range of benefits, including seamless indoor-outdoor integr