What is the key component for preventing basement flooding?

A proper drainage system is the key component for preventing basement flooding because it effectively directs water away from the foundation of a building. This system can include elements like perimeter drains, sump pumps, and grading around the foundation. When properly installed and maintained, these drainage methods ensure that excess water is channeled away, reducing the risk of it seeping into basement areas.

While a sealed foundation, regular maintenance of gutters, and raising the foundation height can contribute to overall basement moisture management, they do not directly address the fundamental need to control and redirect water flow away from the building. A drainage system specifically targets the prevention of flooding by managing surface and groundwater, making it essential for effective flood prevention strategies in basements.