How would you insulate in this situation?

Hi all, I have an insulation question. My house was planned as a slab inside 5′ frost walls (zone 6 southern coastal maine). After walls were poured the builder at… Hi all, I have an insulation question. My house was planned as a slab inside 5′ frost walls (zone 6 southern coastal maine). After walls were poured the builder at…Read MoreGreenBuildingAdvisor