Use the Formable Lead Base Flashing when the base needs to mold around irregular surfaces( e.g. terra-cotta & metal roofs). Much more formable than Dead Soft Aluminum Flashings. The Integral Snow Wedge on the high side of the Flashing diverts sliding snow and ice, as well as, water. Many a Metal Roof Flashing has been destroyed by melting, sliding snow, but not any more with Olympia's exclusive flashing design!