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Bifold Door Seal Repair The bifold door is an excellent addition to any home However, it requires proper installation and maintenance to function properly. This includes a thorough integrity inspection, lubrication and a report of any issues to prevent them from occurring in the future. To minimise sticking to reduce sticking, bifold doors are made to be ever-so-slightly smaller than the frame. However, this also means that air can leak in through the gaps. To stop