Proper Regrading for Basement Water Issues and Foundation Plantings

A homeowner plans to regrade to fix basement dampness. Some contractors suggest simply adding topsoil; research indicates removing topsoil, sloping clay subsoil, then replacing topsoil. They also ask about removing foundation plantings and optimal topsoil depth.

Correct: clay layer must slope properly; water penetrates loose topsoil and runs along the clay. Remove plants to achieve best slope and eliminate root channels. Topsoil typically 3-4 inches; more is fine. Till 3-4 inches of topsoil into top 6 inches of clay for a good planting mix. Also address gutters, downspouts, and foundation waterproofing if needed.