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.
Experts speculate over cause of Iberian power outages
I´m sure politicians will be thumping tables and demanding answers - while Professor Bell, as reported above, says ´wait for detailed professional...