Proper Grading for Water Drainage

Improper grading can create moisture problems, leading to structural damage or biological growth. Proper grading is essential for directing water away from structures and preventing water accumulation.

Significance of Proper Grading for Water Drainage

• Prevents water intrusion into structures, reducing the risk of damage to foundations, walls, and roofing.
• Eliminates standing water, which can create mosquito breeding grounds and contribute to flooding.
• Improves soil drainage, preventing erosion and improving plant health.

Key Elements of Proper Grading

1. Slope Direction

Grading should slope away from structures, with a minimum of 6 inches of fall per 10 feet of distance.

2. Swales and Berms

• Swales are shallow channels that direct water runoff along a gentle slope.
• Berms are raised mounds of earth that serve as water barriers, diverting water away from structures.

3. Drainage Systems

• French drains or weeping tiles are buried pipes that collect and redirect water.
• Downspouts and gutters channel rainwater away from roofs and into drainage systems.

Impact of Moisture on Walls

How Much Moisture is OK in Walls?

Moisture levels in walls should not exceed 16%. Higher levels can lead to:

• Mold and mildew growth
• Structural damage
• Health problems

Preventing Moisture Problems

• Maintain proper grading to divert water away from structures.
• Inspect and repair any leaks in plumbing or roofing.
• Install vapor barriers to prevent moisture from entering walls from the inside.