What is the minimum required fall of grade away from foundation walls within the first ten feet?

The correct requirement for the minimum grade fall away from foundation walls within the first ten feet is 6 inches. This standard is crucial for ensuring effective drainage away from the foundation, which helps prevent water accumulation that can lead to foundation damage, mold growth, and other moisture-related issues.

A fall of 6 inches over 10 feet translates to a slope of at least 5%, which is significant enough to direct rainwater and surface runoff away from the foundation. Proper grading is an essential aspect of site preparation and construction, as it establishes a barrier against potential water infiltration. Ensuring that the land slopes away from the foundation helps maintain the structural integrity of the building and prolongs its lifespan.

Regarding other options, while a greater fall might seem beneficial, the code specifically sets the standard at 6 inches to balance effective drainage with practical grading that can be achieved in a variety of soil and landscaping conditions.