Bi Fold Doors are simply doors which can open easily in or out side and they need not get too much space. There are two types of Bi- Fold Doors interior and Exterior Doors. These are Simple and amazing Flexibility designed doors which can open easily. In Bi-Fold Doors They doors are may be Glass, Wooden and Aluminums as well. Bi Fold Doors are basically had weather rating, security and safety as well. The basic Manufactures of Bi Fold Doors Are comply with recognized independently manufacturers test for water air and resistance penetration and thermal performance etc.