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Bifold Door Seal Repair Bifold doors are a wonderful feature for any home, but they need proper installation and regular maintenance to ensure proper operation. This includes a thorough inspection, lubrication, and an assessment of any issues that may occur in the near future. To minimise sticking to reduce sticking, bifold doors are made to be a little smaller than the frame. However, this also means that air can get in through the gaps. Install an air seal to correct thi