Valleys are created where two similar facing roof slopes meet each other. Valleys tend to collect more of the water runoff from the roof than others and thus tend to leak.
Valley flashings provide a durable, easy-to-install solution that can last many years and, quite often, longer than the adjoining roof materials. Our copper valleys are available with 1" or 1.5" "W" in the middle, in 18" and 24" widths and in 8 ft. and 10 ft. lengths.