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Bifold Door Seal Repair The bifold door can be a wonderful option for any home however, it needs proper installation and maintenance in order to function properly. This includes a thorough integrity check and lubrication, as well as a report of any problems to avoid them in the future. To reduce sticking to reduce sticking, bifold doors are made to be ever-so-slightly smaller than the frame. Unfortunately, this can also cause air to leak in through the gap. To stop thi