Abstract: A foamed plastic module for building an insulated concrete wall structure by stacking the modules together until the desired configuration of the structure is completed, and when the form is filled, a concrete monolithic waffle wall structure having foam insulation permanently attached to the opposed wall surfaces to form the inner and outer wall surfaces of an enclosure is realized. The module is made of foamed plastic material, such as expanded polystyrene, for example, and is built in a pressure molding apparatus. Each module comprises a rigid form block of a generally rectangular configuration having a hollow interior of a particular predetermined configuration formed between spaced apart confronting sidewalls to form a cement waffle wall. The side walls of the module are secured one to the other by a plurality of spaced tension members. The tension members can be formed of metal or plastic material.

Abstract: A module for building an insulated concrete wall structure by stacking the modules together until the desired configuration of a concrete form is completed, and when the form is filled, a concrete monolithic wall structure having foam insulation permanently attached to the opposed wall surfaces to form the inner and outer wall surfaces of an enclosure is realized. The module is made of foamed plastic material, such as styrofoam, for example, and is built in a pressure molding apparatus. Each module comprises a rigid foam block of rectangular configuration having a hollow interior of a particular predetermined configuration formed between spaced apart confronting sidewalls. The inner and outer styrofoam walls of the module are secured one to the other by a plurality of spaced tension members.