the delivery state of the insulation body 10 are pushed out of the insulation body 10 this is shown by corresponding arrows corresponding individual compressive force carrying bodies 14 a 14 c 14 e and 14 g can then be inserted into the now empty apertures 11 a 11 c 11 e and 11 g a corresponding through going reinforcement bar 15 a 15 c 15 e and 15 g runs through each of the individual compressive force carrying bodies 14 a 14 c 14 e and 14 g the heat insulating system made in this way can then be inserted on site into the formwork of the building parts to be produced that is to say in the first instance the formwork for the support which is to be produced beneath the heat insulating system the reinforcement bars 15 a 15 c 15 e and 15 g here are preferably connected to corresponding reinforcement elements provided for the support it is then possible for liquid concrete to be introduced into the formwork of the support through the through opening 12 in the insulation body 10 if the formwork has been filled to a sufficient extent then an internal vibrator can be introduced through the through opening and this helps to compact the fresh concrete within the formwork of the support any air inclusions escape from the fresh concrete in the.