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Bifold Door Seal Repair Bifold doors are a great addition to any home, but they require regular maintenance and installation to ensure proper operation. This includes a thorough examination, lubrication, and the report of any issues that may occur in the future. Bifold doors are made slightly smaller than their frames to minimize sticking. However, this can result in air leakage through the gap. Install an air seal to correct this issue. Seals that are damaged T