What is the minimum requirement for drainage slopes that move water away from a foundation?

The minimum requirement for drainage slopes that effectively move water away from a foundation is to have a fall of 6 inches within the first 10 feet. This requirement is critical because proper drainage helps prevent water from accumulating near the foundation, which can lead to issues such as soil erosion, water infiltration, and potential damage to the foundation itself.

A slope of 6 inches over this distance ensures that gravity can effectively direct water away from the structure, reducing the risk of water pooling around the base. This standard is often cited in building codes to promote good construction practices and help protect homes and other buildings from water damage.

Other options reflect greater slopes that exceed the minimum requirement. However, exceeding the minimum does not diminish the validity of the established standard, which is focused on effective water management while balancing practicality and construction norms.