Galvanized Zinc Roof

Galvanized g90 g90 is not a galvanizing specification.

Galvanized zinc roof.

When steel is galvanized it is really just adding a protective layer of zinc to dteel base to protect it from oxidation as steel is naturally corrosive or will rust when exposed to salt water or moist environment over a long period of time. However paint on metal roofs often peels or rusts in which case it is time to repaint it. Before the introduction of galvalume to the metal roofing industry in the late 20th century using galvanized sheet and coil was a common practice. Zinc coating weights are measured in ounces per square foot and range from g90 to g60 g40 and g30 galvanized steel.

Metal wall and roof panels in galvanized g90. Many metal roofs are made out of galvanized metal which is a type of metal that has been covered with hot zinc in order to protect it from the weather. In most cases when someone refers to galvanized metal roofing they are specifically referring to an inner metal layer of iron and carbon alloy steel that has been dipped in a hot zinc bath and is now coated with a thin layer of the material.