Rigid foam below or above a floor’s joists?

The question below did not receive any responses.  I am trying to rephrase here…I don’t know how common it is to use rigid foam to break/mitigate thermal bridging in floors. … The question below did not receive any responses.  I am trying to rephrase here…I don’t know how common it is to use rigid foam to break/mitigate thermal bridging in floors. …Read MoreGreenBuildingAdvisor