The minimum elevation requirement for a slab-on-grade foundation above the exterior finish grade is what height?

The correct height for the minimum elevation requirement for a slab-on-grade foundation above the exterior finish grade is 8 inches. This standard is established to ensure proper drainage and to minimize the risk of water intrusion into the foundation. Elevating the slab to this height helps protect the structure from moisture and potential damage caused by flooding or prolonged exposure to water.

Maintaining this elevation is critical for the longevity and stability of the foundation, as it directs water away from the base of the home and reduces the likelihood of mold and deterioration. Having the slab too low increases the risk of water accumulation around the foundation, which can compromise the integrity of the building and lead to costly repairs in the future.