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Bifold Door Seal Repair The bifold door is an excellent option for any home however, it needs proper installation and maintenance to function correctly. This includes a thorough integrity inspection, lubrication and a report of any issues to avoid them in the future. Bifold doors are designed slightly smaller than their frames in order to prevent sticking. However, this could result in air leakage through the gap. Install a weather seal to stop this issue. Damaged Seals Weather strips and se