The authors analysis the wall construction containing ventilated facade with only one heat insulating filling layer which simultaneously has constructional service. This filling layer is a bond of AAC-blocks with density value of D400. This bond provides the required heat insulating level without additional external insulation layer. The suggested constructional approach requires the main backing up cantilevers of the venlilated facade subsystem to be anchored in solid cast flooring plaques. The research presents the engineering scheme of such wall construction. Technical advantages and economcal benefits compared to the traditional constructional solution are demonstrated.