SUSTAINABILITY Engineered from high grade Zincalume coated steel, a Fuyang Musi roof is one of the most recyclable and sustainable building products in the world. WEATHER SECURITY WARRANTY Full 25 year weatherproof warranty plus a diminishing pro-rata weatherproof warranty for the subsequent 25 years. HOW LONG HAS STONE-COATED STEEL ROOFING BEEN AROUND? Stone-coated steel roofing occurred during World War II when tar and sand were used to cover galvanized steel bunkers. After the war, the practice was commercialized and the first roofs were produced. Stone coated steel roofs have been protecting buildings since then, but the product technology today bears little resemblance to early practices due to advances in the chemistry of coatings. CAN YOU WALK ON A STEEL ROOF?