Metal roof provides increased wind resistance when compared to other roofing materials. This is because metal roofing systems use interlocking panels. The disadvantages of metal roofs include the noise created from rain hitting the roof, and, in snowy areas, the tendency of snow to easily fall off the roof and onto pedestrians or property. Originally, metal roofs were made of corrugated galvanized steel: a wrought iron–steel sheet was coated with zinc and then roll-formed into corrugated sheets. Another approach is to blend zinc, aluminum, and silicon-coated steel. These products are sold under various trade names like "Zincalume" or "Galvalume". The surface may
Sharon Steel Corporation as semi-finished. The tin and sheet bar is delivered to various tin and sheet mills as a source of steel required for the manufacture of cans, bottle tops, kitchen utensils, enameled ware, toys, sign stock, and similar products. It is also used in auto body sheets, metallic furniture, radio and refrigerator stock, metal lath, steel drums, galvanized and other coated sheets for the manufacture of garbage and ash cans, coal and water buckets, and flat, corrugated and formed sheets for the building trades. The Carnegie, the American Steel and Wire Company, and the American Sheet and Tin Plate Company were