Exterior, Metal Siding Material, Metal Roof Material, House Building Type, Shed RoofLine, and Prefab Building Type Featuring a steel frame and prefabricated exterior panels by EcoSteel, this home designed by a professor of architecture in Miami consumes just one-seventh of the energy needed to fabricate and erect a conventional concrete block home in the area. Issues of durability and sustainability were considered, given Miami's harsh climate, and solar panels and a green roof were also incorporated.  Photo 5 of 7 in 6 Weather-Ready Prefab Homes in Florida