Abstract: A building wall structure is arranged to positioning and securement of a plurality of panel members together, wherein each panel member is formed of a high-density foam body including an interior wall, with an exterior wall including a cementuous layer coextensive therewith. The bottom wall includes a rectilinear trough, wherein the top wall includes a trapezoidal trough to receive reinforcing rod positioned within a cementuous bonding agent contained therewithin. End walls of the panel members are arranged for receiving end wall cementuous materials and reinforcing rod members to assist in securement of adjacent panel members together. Load supporting walls are imbedded within the top wall cementuous materials as required. The panel members include spaced parallel interior cavities coextensive with and extending from the top wall into the bottom wall into communication with the top and bottom wall troughs for receiving additional reinforcing cementuous material and reinforcing rod structure therewithin.