6 Extruded metal roofing and exterior wall siding-panel system, comprising wall panels and roofing panels made of metal; metal fasteners for use with metal roofing and for use with exterior wall siding-panel systems, namely, nails, nuts, bolts, screws, ridge filler plates, angle-pieces, U-profiles, terminal strips, omega rails, and walkway clips; metal upward and lateral extensions for roof coverings, namely, drip edges, gutters, snow catchers, hail protectors and vapor barriers, and metal fasteners therefor, namely, nuts, bolts and screws