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Bifold Door Seal Repair The bifold door is a great addition to any house however, it needs proper installation and maintenance to work correctly. This includes a thorough integrity inspection along with lubrication and a detailed report of any problems to prevent them from happening in the future. To prevent sticking, bifold doors are designed to be ever-so-slightly smaller than the frame. Unfortunately, this can also lead to air leaking in through the gap. Install a weather seal to stop th