... in 1, 3, series. Prepainted aluminum roofingWe can produce aluminum roofing and prepainted aluminum roofing, now this production is more and more used ... is only 1/3 of steel.1) The alloy of aluminum roofing can be 1, 3, 5, 8 series, the most ... popular alloy are 3003, 3004.2) The width of aluminum roofing: 750mm, 840mm, 925mm, 1070mm etc3) The length ...