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Bi Fold Repairs - How to Properly Maintain and Repair Your Bi Fold Doors Many bifold doors are difficult to open and may even start to let in a draft. This is often due to the hardware slipping out of alignment over time. Getting your bi-fold doors back in line is generally easy. It only takes a few adjustments. Misalignment Bi-fold doors are a beautiful feature for any home. They provide a range of advantages, including seamless indoor/outdoor integration aswell as incr