Dry floodproofing is a method of protecting a building from floods by creating barriers and using sealants to prevent water from entering. This approach involves sealing walls and foundations, incorporating anti-buoyancy measures, and installing specially constructed watertight flood panels for doors and windows. This mitigation technique ensures that the building is sealed tightly, with all vulnerable points safeguarded against water intrusion, extending at least one foot above the established Base Flood Elevation (BFE) for a specific location. This strategy aims to keep the interior dry and secure during flood events.
Dry floodproofing is only permitted for commercial structures within AE flood zones. However, it's important to note that floodproofing is generally not permitted for commercial buildings used for residential purposes such as apartments, motels and hotels, or elder care facilities.