What Does A Flood Vent Do

This mitigation technique referred to as wet floodproofing allows floodwater to freely flow through an enclosure such as a crawlspace or garage.

What does a flood vent do.

These permanent openings accomplish this objective by allowing water to pass into or out of a building s exterior foundation walls. A flood vent or flood port is a permanent opening in a wall designed to allow the unobstructed passage of water automatically in both directions in to or out of the building interior. Flood vents protect houses and buildings during floods by preventing hydrostatic pressure buildup that can destroy walls and foundations. The opening in the wall must be at least 3 in diameter.

Flood openings protect residential houses and commercial buildings in floodplains by preventing hydrostatic pressure buildup that can destroy walls and foundations. A garage attached to an elevated building is considered an enclosure. The mapping and regulatory standards of the national flood insurance program nfip are general standards and do not address every flood problem in the united states. Proper opening requirements an elevated building with an enclosure or crawlspace below the elevated floor with proper flood openings flood vents in the enclosure or crawlspace can be rated using the elevated floor as the lowest floor.

Certain floodplains and flood related hazards are less common more destructive and harder to map than riverine coastal alluvial fan and shallow flooding. Flood vents protect houses and buildings during floods by preventing water pressure buildup that can destroy walls and. These permanent openings accomplish this objective by allowing water to pass into or out of a building s exterior foundation walls. The bottom of the flood vent opening must not be higher than 12 inches above the adjacent grade.

The top of the opening must be below the base flood elevation bfe. Why is that so important. See fema technical bulletin 1 2008 page 21 and 26. Smart vent s line of icc es certified engineered flood vents protect houses and buildings during floods by preventing hydrostatic pressure buildup that can destroy walls and foundations.

This mitigation technique referred to as wet floodproofing allows floodwater to freely flow through an enclosure such as a crawlspace or garage. Why is that so important. This requirement refers to the hole in the wall and not the flood vent. What is the objective of a flood vent.