Explore key factors to keep in mind before investing in metal sheets for roofing applications, from thickness and color choices, maintenance needs, durability considerations, and budget considerations - so that you can make an informed choice for your construction project. SteelonCall is the largest steel trading e-commerce space in India, breaking the traditional way of buying and selling steel products. It is a marketplace of buying or selling multiple brands and grades of steel, by connecting manufacturers, sellers & customers on a common online platform.