Installing landscape drainage correctly requires a multi-layered approach that addresses both surface runoff and subsurface groundwater. Following these systematic steps will help protect your foundation and prevent property damage:

1. Conduct an Assessment: Before digging, evaluate your yard’s slope and soil. Use a string line and level to ensure a minimum drop of 1 inch per 10 feet away from the foundation. Perform a percolation test to determine if you have high clay content, which slows drainage.
2. Improve Surface Grading: Establish a positive slope of at least 5% (approximately 1/2 inch of fall per foot) extending 6 to 10 feet from your home. Use clean topsoil, compacting it in 4- to 6-inch layers to prevent settling.
3. Install a French Drain: For areas with standing water, dig a trench 18–24 inches deep with a slope of 1 inch per 8 feet. Line it with geotextile fabric, add 2 inches of gravel, and lay a perforated pipe with the holes facing downward. Cover with more gravel and wrap the fabric over the top before backfilling.
4. Manage Roof Runoff: Attach downspout extensions to move water 5–10 feet away from the foundation. Use splash blocks or bury rigid PVC pipes to direct this water toward a discharge point or dry well.
5. Install a Perimeter Drain: For the most robust protection, install a 4-inch perforated pipe at the foundation footing level. This intercepts groundwater before it exerts hydrostatic pressure against your basement walls.
6. Restore Sunken Concrete: Use polyurethane foam lifting to fix sunken patios or walkways that trap water against the house, restoring a positive grade without replacing the entire slab.