a system for receiving poured concrete to form an insulating wall is generally referenced at 10 in fig1 . the structure 10 consists of opposed forms 11 each having a bricklike pattern on an interior surface 12 thereof . the forms may have any other pattern or be smooth . the forms 11 are held in generally parallel opposed fashion by a form tie 13 received in a correspondingly shaped indentation 13a in each panel 11 , and held therein by pins 14 or other suitable form tie means . reinforcing rods 15 may be supported by the form ties 13 . the insulating board 16 carries a number of tie - rods 17 laterally affixed therein by retainers 18 , which may take several forms and are described in greater detail below . the tie - rods 17 extend substantially the entire distance between opposite forms 11 so that when concrete is poured into the space on either side of the insulating board 16 between the forms 11 , the insulating board 16 will remain substantially immovable in the desired location between the forms . moreover , as the poured concrete cures , the tie - rods 17 will be held within the concrete and form a structure comprised of outer layers of concrete and an inner insulating layer of insulating board 16 which is rigidly mechanically affixed therebetween . such a completed wall structure is shown partly in section in fig2 with the concrete layers referenced at 20 . the rods 15 are of course retained in the cured concrete 20 and serve as further reinforcement therefor . as can be seen in fig1 and 5 , any number of panels 11 may be joined together to construct a wall of any desired dimensions . although any suitable insulating board 16 may be uilized , a particularly advantageous insulating board is polystyrene foam insulation board . sectional views of the structure of fig1 including concrete poured therein are shown in fig3 and 4 including the retainer embodiment shown in fig1 , which will be described in greater detail below . a number of different embodiments for retainers for fixing the lateral position of the tie - rods 17 with respect to the insulating board 16 are shown in fig6 through 10 . the embodiments shown in fig6 a and 7a utilize a plate which has a central aperture surrounded by flaps which permit insertion of the tie - rods 17 in one direction , however , abut the rod to prevent removal of the tie - rods 17 in an opposite direction . in order to minimize the time for manual attachment of each of the plate - type retainers on opposite sides of the board 16 , in the embodiments shown in fig6 and 7 , the rod is provided with structure to limit insertion of the rod into the board 16 so that only a single plate need be affixed to the rod on the opposite side of the board 16 . turning now to a detailed discussion of each of the retainer means a square plate 22 is shown in fig6 and 6a which has a central aperture 25 surrounded on two sides by semi - flexible flaps 24 . a tie - rod 17b is inserted through the aperture 25 in a first direction and is retained in place by the flaps 24 to prevent removal of the rod from the plate 22 . the rod 17b is also inserted through a plate 26 having a central circular aperture until flanges 27 on the rod 17b abut the plate 26 at which time the plate 22 is forced against the board 16 to fix the lateral position of the rod 17b with respect to the board 16 . as shown in fig7 and 7a , a circular plate 18 may also be utilized having a central aperture 19 having a plurality of flaps therein which operates in a similar manner to the plate 22 to allow insertion of a rod 17a a certain distance in one direction , but prevents removal of the rod when pulled in an opposite direction . as shown in fig7 a rod 17a has two right angle bends 23 therein to limit insertion of the rod 17a in the board 16 against a washer 26a so that the plate 18 can be forced against the board 16 to affix the position of the rod 17a therein . as also shown in fig7 the ends of the rod 17a may be covered by a corrosion - resistant coating or cap 37 to minimize the formation of rust spots when the forms 11 are removed after the concrete has cured . surface rusting on the concrete face can also be prevented by using corrosion - resistant rods . it will be understood to those skilled in the art that the plate shown in fig7 a may be utilized with the flanges 27 in fig6 and the plate 22 may be equally as well utilized with the right angle bends shown in fig7 . another retainer embodiment is shown in fig8 and 9 consisting of a conically tapering bore 31 which is formed by opposed sloping flanges . the flanges are inserted through the board 16 and the ends 30 thereof are bent outwardly upon exiting the board 30 . another flange 29 is carried on an opposite end of the retainer 28 . a key - shaped opening allows the tie - rod 17 to be received and locked therein by turning it as it is inserted . projections on the rod are locked on opposite sides of the key - shaped opening . once the retainer 28 is affixed within the board 16 , and the tie - rod affixed within the retainer 28 , the lateral position of the tie - rod 17 becomes fixed . a final retainer embodiment 33 is shown in fig1 consisting of a first cylindrical element 36 having a flange 34 and further having an inner diameter which corresponds to the outer diameter of a second cylindrical element 37 , which has a flange 35 . the elements 36 and 37 are inserted within the insulating board 16 until the respective flanges 34 and 35 abut the opposite surfaces of the board 16 . a tie - rod 17b having flanges 27 thereon is inserted into the retainer 33 which has a detent means therein for receiving the flanges 27 , thereby affixing the position of the rod 17b with respect to the insulating board 16 . it will be apparent to those skilled in the art that the tie - rods 17 in addition to immovably holding the insulating board 16 between the forms 11 can be utilized to support reinforcing mesh or rods during pouring of the concrete . other modifications and changes may be suggested by those skilled in the art , however , it is the intention of the inventor to embody within the patent warranted hereon all changes and modifications as reasonably and properly come within the scope of his contribution to the art .