Dry Floodproofing
A flood retrofitting technique in which the portion of a structure below the flood protection level (walls and other exterior components) is sealed to be watertight and substantially impermeable* to floodwaters
Dry Floodproofing graphic-Maximum protection level is 3 feet (including freeboard), backflow valve prevents sewer and drain backup, external coating or covering impervious to floodwater, shields for opening.