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Bifold Door Seal Repair Bifold doors incorporate door panels into concertinaed tracks to allow you to open and close an area. In time, they can be affected by a variety of common problems that require professional attention. Inadequate maintenance can cause your bifold door to jam, resulting in hardware problems and jammed doors. To help prevent this from happening, you should grease your bifold doors every couple of weeks. Deteriorating Seals As bifold doors are constantly exposed to the elements, their seals may get deteriorated