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Bifold Door Seal Repair Bifold doors make a fantastic feature for any home, but they need proper installation and regular maintenance to ensure proper operation. This includes a thorough examination of the lubrication system, as well as a report on any problems that could arise in the future. Bifold doors are designed slightly smaller than their frames to minimize sticking. However, this could lead to air leaking in through the gap. Install a weather seal to stop this problem. Seals that have been damaged The