F-Factor for slab with insulation on top?

Does anybody know how to determine the F-factor of a slab-on-grade with insulation on TOP?I’m trying to find/calculate the F-factor of the assembly shown in the attached image (with and… Does anybody know how to determine the F-factor of a slab-on-grade with insulation on TOP?I’m trying to find/calculate the F-factor of the assembly shown in the attached image (with and…Read MoreGreenBuildingAdvisor