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Bifold Door Seal Repair The bifold door can be a wonderful addition to any home however, it needs proper installation and maintenance in order to work correctly. This includes a thorough inspection of the integrity along with lubrication and a detailed report of any issues to prevent them from happening in the future. Bifold doors are designed slightly smaller than their frames to reduce sticking. However, this can lead to air leaking in through the gap. Install an air sea