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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. The hardware could have gotten out of alignment over time. The process of getting your bi-fold doors back in line is typically simple. It's only a matter of a few adjustments. Misalignment Bi-fold doors are a stunning feature for any home. They offer a variety of benefits, including seamless indoor/outdoor