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Bifold Door Seal Repair The bifold door is a great addition to any home, but it requires proper installation and maintenance in order to function correctly. This includes a thorough examination, lubrication, and an assessment of any issues that might arise in the future. To reduce sticking, bifold doors are designed to be a little smaller than the frame. Unfortunately, this can also lead to air leaking in through the gap. Install a weather seal to fix this issu