National Flood Insurance Program (NFIP) Policy Index

• Definition/Description
• Guidance
• Related Keywords

Definition/Description

Standing water or slowly moving water can induce horizontal hydrostatic forces against a structure, especially when floodwater levels on different sides of a wall are not equal. Also flooding can cause vertical hydrostatic forces, or flotation. Hydrostatic forces are one of the main causes of flood damage.

Guidance

• IS-9 Managing Floodplain Development Through The National Flood Insurance Program (NFIP) (Page 1-27) (PDF 8MB, TXT 1MB) (entire document)
• Openings in Foundation Walls and Walls of Enclosures (Technical Bulletin 1) (2008)
• Crawlspace Construction for Buildings Located in Special Flood Hazard Areas (FIA-TB-11)

Related Keywords

Openings
Crawlspace