The term “tin roof” is a bit of a misnomer, since no roof was ever actually made with pure tin. When you hear “tin roof” being used, it’s to describe a roof made of metal. Tin came into the picture in the 1600s, when it was used as a coating on rolled steel to prevent rust. Today, there is a wide range of metal roofing options. In addition to metal sheet roofing, there are also metal tiles made to resemble more conventional roofing tiles.