How to Correct Foundation Grading

Water is the silent enemy of your home's structural integrity. When the ground around your foundation slopes toward the house rather than away from it, you invite pooling, basement leaks, and potential shifting of your footings. Correcting this grade is the single most effective way to prevent moisture-related damage before it starts. Achieving a proper grade is not about moving mountains, but rather about creating a consistent, gentle slope. You want a minimum drop of six inches over the first six feet of soil extending from the house. When done well, rainwater hits the ground and follows a path away from your structure, keeping your perimeter dry even during the heaviest storms.

  1. Spot Water Pooling First. Walk the perimeter during or immediately after a rainstorm to identify where water currently pools. Use a long level or a string line to determine if the ground currently tilts toward or away from the house.
  2. Clear Three Feet Back. Remove any decorative stone, landscape fabric, or mulch that sits directly against the house. Pull these back at least three feet to expose the bare soil and ensure the new fill bonds properly with the existing earth.
  3. Build the Crown. Apply a clay-heavy soil mix directly against the foundation wall to create a high point. Pack this soil down firmly with your feet or a hand tamper to ensure it is dense and resists future erosion.
  4. Create the Downward Slope. Distribute the additional soil outward from the foundation to create a steady decline. Aim for a one-inch drop for every foot of distance for the first six feet, moving from the wall toward the yard.
  5. Lock Soil Together Tight. Run a lawn roller or use a tamper over the freshly placed soil to settle it. Adding water lightly as you compact can help the soil particles lock together for a tighter seal.
  6. Secure Soil With Seed. Reinstall your stone or mulch over the new grade, or plant grass seed to hold the soil in place. Ensure no decorative materials are pushed up against siding, as this can trap moisture.