Berger Bros. Co., Feasterville, Pa., offers the F-Rail, a highly functional, rail-style snow fence. The cast aluminum rail is designed for standing seam metal roofs and requires no penetration of the roof’s surface. The fence provides for multiple rails at three different heights to suite climactic variations. The lowest position rail is below the standing seam of the roof, thus helping to reduce the possibility of dangerous ice slides. The rails are inserted through open pockets, making installation much easier and more efficient.