Abstract: An insulated concrete form system for constructing the exterior walls and gable ends of a structure is disclosed using expanded polystyrene forms that interconnect and are bonded to each other and to the structure's slab or foundation with concrete. Internal, substantially columnar voids are provided in each of the panel forms and both the interior and the exterior surfaces of the walls and gable ends may be finished with a variety of finish materials using furring strips that are incorporated into the interior and exterior surfaces of the forms.