The Firestone UNA-CLAD UC-9 Roofing Panel is a factory formed architectural standing seam metal roof panel with a proven 1.5" tall continuous interlocking seam that snaps together for ease of installation. The system, which may be covered by a our 30-year Platinum Warranty, uses a concealed clip fastening system for added protection. It is able to accommodate very long panels and virtually unlimited thermal expansion.