A method of assembling molded forms of expanded closed cell polystyrene to receive poured concrete for foundations and walls for buildings, including a laid course of forms molded of expanded polystyrene having vertical spaces in the forms and a plastic or metal strip With claws attached to the plastic or metal strip, and the strip is placed in a groove channel in the form and the strip extending into a groove in next abutting form of expanded polystyrene, and the strip width extending into a groove in the next laid course of expanded polystyrene forms and reinforcing bars placed vertically in vertical spaces in the forms of expanded polystyrene, and the reinforcing bars placed vertically in the vertical spaces and held in position by an aperture guide wire having a bias cut on leg end of the aperture guide wire and spanner wires extending across from side to side of the forms of expanded polystyrene, and the spanner wires having bias cut leg ends to stab into the top edges of the forms of expanded polystyrene, and a horizontal reinforcing bar extending into at least one abutting form of expanded polystyrene and, pouring concrete into the laid course.