Technical Bulletin 1, Openings in Foundation Walls and Walls of Enclosures (2020)

NFIP Technical Bulletin 1 from March 2020 provides detailed requirements for flood openings below elevated buildings in Special Flood Hazard Areas, in accordance with the National Flood Insurance Program (NFIP) regulations. It includes specifications for different types of enclosed areas, flood openings, and guidance on documenting building elevations using the NFIP Elevation Certificate. The bulletin explains the importance of compliance with NFIP requirements to reduce flood damage and lower flood insurance premiums.