Roofs are exposed to very harsh weather conditions over many years. To avoid corrosion and guarantee the longevity of steel sheet roofing, the coating of the steel must be of the highest quality. The coating structure is typically built up of three layers of lacquer over a basic zinc coating.
Klein Vision unveils AirCar production prototype
According to the Klein Vision website, they claim the market for flying cars will be $1.5 trillion by 2040, so at the top end $1 million per unit that...