What is the required surface drainage slope away from a foundation wall?

The requirement for surface drainage slope away from a foundation wall is essential to prevent water accumulation around the foundation, which could lead to structural issues such as basement flooding and foundation damage. The correct answer specifies that there should be a slope of 6 inches over 10 feet. This means that for every 10 feet of distance from the foundation, the ground level should drop by at least 6 inches.

This standard ensures that rainwater and other surface runoff flow away from the home instead of pooling around the foundation. Adequate drainage is a critical aspect of building practices to ensure the longevity and stability of the structure. Other options provide slopes that are either greater or less than the recommended standard, which could potentially lead to improper drainage and associated problems with moisture and water ingress.