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Bi-Fold Door Repair They can be either internal or external, bi-fold doors offer a degree of flexibility that can be customised to meet the needs of any homeowner. But, like all other fixtures and fittings, they are prone to suffer from the occasional wear and tear. It's not that difficult to get them back into good working order. With a bit of patience and basic woodworking skills you can tackle a number of simple bi-fold door repair projects. Cracked Corners Bifold doors are generall