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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 of the lubrication system, as well as an assessment of any issues that may occur in the future. Bifold doors are made slightly smaller than their frames in order to prevent sticking. This also means air can enter through the gaps. Install a weather seal to fix this issue. Damaged Seals A bifold door's ability to sea