the two walls 12 and 14 of course the module 10 can be modified and more specifically the connecting rods 16 can be sized for a specific formwork application even though only two connecting rods 16 are sufficient to maintain the parallel relationship between the two side wall panel structures 12 and 14 a person skilled in art would appreciate that the use of a plurality of connecting spacer rods 16 disposed regularly throughout the surface of the module 10 further allows maintaining the integrity of the concrete wall formwork module 10 during the sideways thrust which occurs during pouring of the concrete between the two side wall panel structures 12 and 14 returning briefly to fig1 and 2 an elongated fastening plate 40 extends along the width of each side wall panel structures 12 and 14 parallel to the horizontal rods 28 the plate 40 includes a flange for securing the plate 40 on the top portion of the grid 18 in a snap fitted way the fastening plate 40 can also be secured to the grid 18 using fasteners or other fastening means even though the module 10 has been illustrated with a grid 18 having stand out portions 26 on the vertical rods 24 a person skilled in the art will appreciate that the horizontal rods can alternatively be shaped to include stand out portions the assembly of a plurality of modules 10 in a formwork and their use to receive concrete will now be explained in more detail with reference to fig5 to 8 as illustrated in fig5 two adjacent modules 10 on a same row are abutted then they are secured to one another by attaching adjacent pairs of stand out portions 26 one from each module 10 using tie wires two.