What R Value can I get from a NUDURA ICF wall?

The aggregate R Value of a NUDURA ICF Wall, with concrete and gypsum board interior finish in place, is 22.4. We state this as a standard value across all thickness of form unit as the thermal resistance of concrete is nearly negligible. The actual R Value would have to be determined from the overall performance of the wall as a system. A performance R Value which is based on energy savings and studies of thermal resistance of an ICF wall shows that a wall of R50 is not at all uncommon.