Sub-Slab Insulation in the Southwest – GreenBuildingAdvisor

Location: Northern N.M

Any references for foundation performance with vs. without below slab insulation in an area where we are much more concerned about cooling rather than heating loads?  Small home will be heavily insulated above grade, quality glazing and exterior shading of windows, but will be a flat EPDM roof and no natural shade.  Home will not have AC for the summer months, relying on passive house levels of above grade insulation and window shades.  Heat will be solar gain and wood- not concerned about the heating loads at all.  Will we run much cooler in the summer with only perimeter insulation and nothing beneath the interior of the slab?

Thank you.