
Metallic Building Material with Standing Seam Roofing Sheet, Convex Panel. Long Service Life: More than 50 years in common climate conditions. No Hole Installation: Point-support system with no surface holes or manual punching required. Thermal Expansion Buffer: Seam and clip connection absorbs stress, enabling extra-long panels without deformation. Waterproof & Ventilated: Rib seam zipping creates watertight connection while allowing indoor moisture release. FM Approved Fire Rating: Fire resistance test result: A Class (ASTM E108-11 item 8). Customizable Colors: PVDF coating available in any color for orders over 1000 square meters. Low Pitch Roof Compatible: Applicable for roofs with a pitch as low as 1.5 degrees. Excellent Acoustic Performance: STC=50 rating with rigid mineral insulation to reduce echo and reverberation.