Building Up Soil Against a Foundation to Divert Water

Fill Dirt, Taper, and Avoid Plastic Under Mulch

For a concrete/block foundation, add 4–5 inches of compacted fill dirt (clayey subsoil preferred) against the wall, tapering to grade over at least 5 feet beyond the eave.

• Black plastic blocks root growth—harmful to foundation plants.
• Mulch is cosmetic; doesn't affect drainage.
• Ensure the slope directs water away from the house.

Compact in lifts; verify with a level. This simple grading fix solves the inspector's concern.