Insulation under slab with radiant heat

I have seen on this site it’s highly recommended to place the 10-15mil vapor barrier directly under the slab and then the EPS or XPS below the vapor barrier. My… I have seen on this site it’s highly recommended to place the 10-15mil vapor barrier directly under the slab and then the EPS or XPS below the vapor barrier. My…Read MoreGreenBuildingAdvisor