Welcome to the Garage Doors & Openers group of SmartGuy.com. Feel free to interact with other professionals from across the world. You can find professionals, find deals on services, find professionals who might barter, or simple post questions, comments, or suggestions. A garage door is a large door on a garage that opens either manually or by an electric motor (a garage door opener). Garage Doors & Openers are included in most residential homes. Most garage doors are frequently large enough to accommodate two automobiles and other vehicles.