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Bifold Door Seal Repair Bifold doors incorporate door panels into concertinaed tracks to open and close a space. As time passes, these doors may develop a few common problems that require assistance from a professional. A lack of regular maintenance could cause your bifold doors to lock up, causing problems with the hardware and doors that are stuck. You can prevent this by making sure that your bifold doors are lubricated at least every two weeks. Seals that are degrading Seals on bifold doors can degrad