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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 allow drafts. The hardware could be out of alignment with time. Getting your bi-fold doors back in line is generally easy. All you need is a few minor adjustments. Misalignment Bi-fold doors are a stunning addition to any home. They offer a variety of benefits, including seamless indoor/outdoor in