Car ports are simple structures that are effective at protecting your vehicle from rain, hail and snow. A more complex car port can include walls like a garage. Car ports are most effective for vehicles when they are built on a concrete or black top driveway. Although, when it is more convenient some car ports can be constructed on stone, grass or several other surfaces. Most car ports are constructed using metals like aluminum or steel. Aluminum is a lightweight metal that is rust resistant. In most cases, steel is a cheaper more durable alternative.