Thermomass' complete line of concrete insulation systems use fiber-composite connectors to structurally tie two layers of concrete together through predrilled, prefabricated extruded Polystyrene insulation (R-5 per inch of thickness) or Polyisocyanurate insulation (R-6.5 per inch of thickness).
Distinguished from the traditional Caloric theory which treats heat as substance without mass, the thermomass theory treats heat as a flux of substance with mass.