With Classic Metal Roofing Systems products you can rest assured that you are providing your customers with a quality roof that will last them a lifetime. Our unique four-way interlock and nail clip system assures a weather-tight, wind-resistant hold on all four sides of a Classic Metal Roof. This interlock system has been proven in laboratory tests to remain watertight even during wind-driven rain of over 110 miles per hour. Classic Metal Roofing withstood the ravages of Hurricanes Andrew and Hugo, two of the worst hurricanes of the century, without blowing off or leaking!