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Bifold Door Seal Repair Bifold doors are a wonderful feature for any home, but they require regular maintenance and installation for correct operation. This includes a thorough inspection of the integrity and lubrication, as well as a review of any issues to prevent them from happening in the future. To reduce sticking to prevent sticking, bifold doors are designed to be ever-so-slightly smaller than the frame. However, this could result in air leakage through the gap. Instal