Basement flooring assembly

I am in climate zone 4a with a dry basement built in the 1920s. I don’t believe there is insulation or vapor barrier under the slab. I want to replace… I am in climate zone 4a with a dry basement built in the 1920s. I don’t believe there is insulation or vapor barrier under the slab. I want to replace…Read MoreGreenBuildingAdvisor