What type of lumber can be used for wood components below the BFE?

The use of marine grade plywood or pressure-treated lumber for wood components below the Base Flood Elevation (BFE) is crucial for ensuring the structural integrity and longevity of buildings in flood-prone areas. When wood is exposed to potential flooding, it must be treated or manufactured to withstand moisture and resist decay caused by prolonged exposure to water.

Marine grade plywood is specifically engineered to resist delamination, swell, and mold growth due to its high moisture resistance. Similarly, pressure-treated lumber is infused with chemicals that protect against rot, insect infestation, and degradation from water contact. This makes both options particularly suitable for use in flood-prone environments where components may be submerged or experience high humidity for extended periods.

Using untreated wood, common lumber types without moisture resistance, or simply painting wood components does not provide adequate protection against the harsh conditions associated with flooding. These materials may degrade quickly when exposed to water, leading to structural issues and loss of safety. Therefore, the correct selection of materials is imperative for floodplain management to mitigate damage and ensure resilience in flood scenarios.