Galvanized iron sheets, simply called G.I. sheets are the most common and widely used roofing material. It is available in plain, corrugated, trafford and as tile profiled. The powder coated galvalium roofing sheets are available from 0.20mm to 0.50mm thickness. These sheets are preffered by most of the customers because of its cost efficiency. They are attractive, Durable and also available in wide range of asthetic colours that suit the environment. GI sheets are made of steel gone under a chemical process to keep away corrosion. They are coated with a layer of zinc oxide to prevent it from rusting. Thus GI sheets have gained much popularity among people than other sheets.