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Bifold Door Seal Repair Bifold doors incorporate door panels into concertinaed tracks to allow you to open and close the space. As time passes the doors can be prone to a variety of common issues that require professional assistance. Inadequate maintenance can cause your bifold door to jam and cause hardware issues and doors that are stuck. To prevent this from occurring, you should grease your bifold doors every few weeks. Seals that are deteriorating Seals on bifold doors can degrade with time, as the