The MR-24® system handles it perfectly because of how its seams are constructed. Standard metal roofs rely on screws that pierce the panels, creating thousands of tiny holes where freezing ice and snow melt can easily seep in. The MR-24® has no external punctures. The panels are mechanically rolled together right on your job site into a 360-degree double-lock seam, effectively sealing out ice, driving rain, and standing water like a giant tin can.