Floodwalls and levees are self-supporting barriers to floodwater. They keep the building dry and protect it from:

• Unequal water pressure on building walls
• Erosion (or scour) at the foundation
• Damage by floating debris

Follow the links below to learn more about using these techniques effectively.

Permanent Barriers

• Levees
• Floodwalls
• Panel Closures

Temporary Barriers
Sandbags and water-inflatable dams are temporary, self-supporting barriers to floodwater. Shields can be supported against the building or on frames built out from the walls. Follow these links for more information on using these techniques safely.

• Sandbags
• Water-inflatable Dams
• Plastic Wraps and Shields