Bi-Fold Door Repair They can be either internal or external, bi-fold doors provide a certain amount of flexibility that can be tailored to meet any need. Like all fixtures and fittings, they can be subject to wear and tear. Thankfully, it's not hard to restore them to good working order. https://bifold-door-repair20234.bloggosite.com/37100323/7-simple-changes-that-will-make-a-big-difference-with-your-bi-fold-door-repairs