What is lawn grading?

Lawn Grading: Slope and Drainage Foundation

Lawn grading refers to the process of establishing proper slope and elevation contours in your yard to manage water drainage and create functional outdoor spaces. Proper grading directs rainfall and irrigation water away from structures and problem areas, preventing pooling, erosion, and boggy conditions. In Charlotte's Piedmont clay soils, which naturally resist water infiltration, proper grading is foundational to preventing the standing water that creates weed problems, disease, and poor turf conditions.

Why Proper Grading Matters

• Prevents Ponding: Water that ponds creates anaerobic conditions lethal to grass roots and ideal for diseases like pythium and root rot
• Protects Structures: Proper slope directs water away from foundations, preventing water damage and basement flooding
• Supports Turf Health: Well-drained soil promotes deep root development, disease resistance, and overall grass vigor
• Reduces Weed Pressure: Moisture-loving weeds like Virginia buttonweed thrive in poorly drained areas. Improving drainage reduces their competitive advantage
• Prevents Erosion: Proper slope and adequate vegetation protect soil from erosion during heavy rain events

Grading Standards

Most building codes and landscape professionals recommend minimum slope of 2% (2 feet of drop per 100 feet of horizontal distance) moving away from structures. For visual purposes, a 1% slope is often imperceptible but still provides meaningful drainage. For problem wet areas, slope can be increased to 3-5% to provide more aggressive drainage.

When Regrading Is Necessary

1. Standing Water: If water puddles for more than a few hours after rain, regrading is necessary to improve drainage
2. Structural Issues: If water is settling near your home's foundation, regrading is critical for foundation protection
3. Recurring Weed Problems: If specific lawn areas consistently develop weed infestations related to excess moisture, grading adjustments may solve the underlying problem
4. New Construction: Many new homes have improper grading from construction. Professional regrading prevents long-term problems