There are different type of materials for the construction of roof frame and roof covering. Common materials are metal/galvalume sheets, ferrocement, plastics and canvas.
Most common material for roof covering is High Quality, High Grade, Pre-Coated Galvalume Sheet of Thickness 0.8 mm to 1.6 mm. Galvalume steel is the ideal material being flexible strong and corrosion proof. It is aluminum-zinc alloy-coated steel sheets with 55% aluminum, 43.5% zinc and 1.5% silicon coating.