![]() What are Flood Vents, Why & Where Are They Used? How do flood vents protect against foundation collapse if floodwaters enter a basement or crawl space?Ī flood vent or "flood port" is a permanent opening in a wall designed to allow the unobstructed passage of water automatically We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. We provide information on where and how flood vents should be installed. We also list flood vent brands, manufacturers, and sources of where to buy flood vents. This article gives a definition of foundation flood vents and explains how they work and why flood vents are needed.įor buildings located in flood zones - areas where flooding is likely, permitting water to flood a building basement or crawl space - even if it seems counter-intuitive, can prevent more drastic building damage such as foundation collapse. We have no relationship with advertisers, products, or services discussed at this website. ![]() Had it broken-away as designed, there likely wouldn’t have been any damage to the livable area of this building.InspectAPedia tolerates no conflicts of interest. A large obstruction can be seen behind the wall, preventing it from breaking-away. The window was smashed and flood waters rushed inside. When this wall failed to break-away, the wave action was deflected upwards. If designed properly, the following photograph shows how a ground floor enclosure with breakaway walls would/should look after a ravaging storm. Wooden lattice will break more readily when struck by floating debris. It won’t break, and will collect a large amount of debris causing the wave action force to be transmitted to the entire building. Plastic lattice is much too durable for below flood applications in type "V" and "Coastal A" flood zones.Exterior siding is extended down to cover breakaway walls. ![]()
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