Abstract: A high strength insulated building structure. The building structure uses a rigid foam building panels having kerfs on each side. The kerfs on the rigid foam building panels are complementary in shape to pre-cured jacketed concrete posts. The pre-cured jacketed posts have a mounting attachment foot adapted for mounting on a substructure, and the building panels are securely and sealingly mounted between adjacent, substructure secured, jacketed concrete posts. The jacketed concrete posts are also provided with top attachment members which are secured to beams which run horizontally above the rigid building panels. The building panels are also provided with furring strips recessed to be flush with their interior and exterior surface, for permitting fasteners to be used for fastening other structural components thereto, such as gypsum board on the interior and siding on the exterior. The building structure provides a high strength, highly insulating structure with quick building time in the field.