Capillary break necessary for above-grade slab?
I’m planning to build in coastal Delaware (zone 4). We’re in a flood zone, so we plan to use a 4 foot above-grade CMU stem wall and slab for the entry level of the house. At 4 feet above grade, does my slab still require a capillary break (gravel layer), or can the slab insulation just sit on fill dirt? Thanks in advance.