Icynene is saying a commercial, stick-frame building with open cell spray foam installed 5.5" thick at the roof deck performs the same as R-38. Has anyone run across this? Their explanation goes on to say that the enhanced performance is determined by energy modeling they have performed on certain test buildings. If this is true, then is it simply a matter of having an energy modeling report done on the building in question? And does this mean it is beyond the scope of the Comcheck software? Thanks in advance.