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Bifold Door Seal Repair The bifold door is a great option for any home However, it requires proper installation and maintenance in order to function properly. This includes a thorough inspection, lubrication, and a report on any problems that could arise in the near future. Bifold doors are designed to be slightly smaller than their frames in order to prevent sticking. This also means air can leak in through the gaps. Install a weather seal to stop this problem. Damaged Seals Seals and weather strips are cr