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Bifold Door Seal Repair Bifold doors integrate doors into concertinaed tracks to let you open and close an area. Over time, they may suffer from a number of common issues that require professional attention. A lack of regular maintenance could cause your bifold doors to lock up, causing issues with the hardware as well as stuck doors. To help prevent this from occurring it is recommended to lubricate your bifold doors every few weeks. Seals that are degrading The seals on bifold doors could degrade