Bi-Fold Door Repair They can be either external or internal, bi-fold doors provide flexibility that can be customized to meet the needs of any homeowner. Like all other fittings and fixtures, they could be subject to wear and tear. It's not difficult to bring them back to their original condition. https://bi-folding-door-repair-ne94217.dbblog.net/3781463/what-is-bi-fold-door-repairs-heck-is-bi-fold-door-repairs