The system features concealed clip and fastening approach allowing thermal contractions of the panel and at the same time concealing the fastener from corrosion. This system can also be utilized on fascia or mansard application and as a siding, for both remodeling and new construction. The panel design secures the female interlock hem into the male leg continuously, lending structural characteristics to apply it over open rafters or substrate by concealed clips allowing for unrestricted thermal movement.