How many inches above the top of the footing must gravel drains extend?

Gravel drains are installed to help prevent moisture buildup around the foundation of a structure, which can lead to various issues, including potential damage to the footing or the foundation itself. In accordance with the North Carolina Residential Code, gravel drains must extend at least 6 inches above the top of the footing. This requirement ensures that the drain effectively redirects water away from the foundation while maintaining an adequate height to prevent erosion or pooling of water around the base of the structure. The specification helps in managing drainage effectively, promoting longevity and structural integrity of the building.