Building wall panel system

An integral siding/roofing building wall panel, comprising:

• an elongated rectangular base portion formed of structural sheet material having opposite spaced apart inner and outer faces,
• said base portion having longitudinal upper and lower edges dimensioned to span across for attachment with at least one pair of spaced apart upwardly extending parallel structural supports of a building structure, said lower edge of said base portion sloping upwardly at an acute angle from said inner face toward said outer face,
• said base portion including opposite ends adapted to lie along said structural supports and of sufficient thickness between said faces for providing a rigid wall,
• an outer surface portion formed of sheet material on the outer face of said base portion,
• said outer surface portion having an outer, weather resistant surface formed by an embossing process to resemble a plurality of shingle elements laid side by side and having an upper edge spaced downwardly and parallel of said upper edge of said base portion forming an exposed fastening strip surface on said outer face of said base portion along said upper edge, said outer surface portion terminating along said upper edge with an interlocking surface sloping upwardly and outwardly of said fastening strip surface of said base portion at an acute angle adapted for positive interlocking engagement with said sloped lower edge of said base portion of another of said building wall panels placed in an adjacent upward level against said structural supports,
• said outer surface portion having a lower edge portion projecting downwardly of said lower edge of said base portion and having an inner face portion adapted to abut and overlie said fastening strip surface on the base portion of another of said building wall panels interlocked therewith when placed in an adjacent lower level against said structural supports,
• said lower edge portion having an irregular lower edge formed to resemble lower edges of shingle elements placed side by side, and said outer surface portion formed with grooves between adjacent shingle elements open along said lower edge to discharge water onto the outer surface portion of a panel interlocked therewith in an adjacent lower row and
• a key spline along said upper edge of said outer surface portion, said key spline having a lower portion embedded in said base portion and sloping parallel of said interlocking upper edge of said outer surface portion.