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Bifold Door Seal Repair Bifold doors connect doors into concertinaed tracks to let you open and close an area. Over time the doors can have a few issues that require expert assistance. Inadequate maintenance could cause your bifold door to become jammed, resulting in hardware problems and doors that are stuck. To prevent this from happening it is recommended that you grease your bifold doors every few weeks. Deteriorating Seals As bifold doors are