Bowling Green has door and door frame dealers available. These are outlets that offer doors and door frames for sale (usually along with installation) for both residential and commercial purposes. These are structures designed to allow entry, exit and closure from rooms. The measurements for these can vary a fair bit, which is why you should call a service agent from the dealer first, to enable him to take measurements and suggest the right kind of door/door frame. The kind of door or door frame can also vary widely in the material used, such as steel, wood, alumunium, etc. The locking system can also vary widely, including automated locking. Fire-retardant material may be used to manufacture the doors. The kind of door or frame used depends on the intended use of the door. These are usually covered by a warranty and services available. Experienced hardware specialists can help meet your exact needs.