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Bifold Door Seal Repair Bifold doors are a great feature for any home, but they need regular maintenance and installation for proper operation. includes a thorough examination of the lubrication system, as well as a report on any problems that could arise in the future. To reduce sticking to prevent sticking, bifold doors are designed to be a little smaller than the frame. However, this also means that air can enter through the gap. To stop this, you can install a weather seal. Damaged Seals The ability of