Letting water into part of your home may sound like the last thing you should do during a flood. But in an appropriately designed enclosure, allowing floodwater to enter and exit can help reduce the risk of serious structural damage.
That is the principle behind wet floodproofing.
When floodwater rises outside a building while the inside remains dry, the difference in water levels creates pressure against the walls. Wet floodproofing allows water into designated areas so those levels can equalize. Proper flood openings make that exchange happen automatically, without someone needing to remove a cover or open a door. FEMA’s wet floodproofing guidance
More than installing a vent
An effective wet floodproofing plan considers the entire space. Flood openings, flood-damage-resistant materials, and appropriate protection for utilities all have a role. The space must also be eligible for this approach under the applicable requirements.
Wet floodproofing does not make an ordinary finished room suitable for flooding. It is a strategy for specific permitted spaces and uses, with design decisions that should be reviewed before work begins. FEMA Technical Bulletin 7
Start with the space you have
Before buying materials, ask your local floodplain administrator or design professional to review your enclosure. Bring photos, dimensions, and any existing flood elevation information.
At Flood Solutions, we believe understanding the purpose of flood vents is the first step toward choosing them well. Once your project requirements are clear, we can help you find the product information you need.
Explore our flood vent resources to begin planning your project.
