Exterior Landscape and Control of Rain Water Runoff
Exterior landscaping design is critical for control rain water runoff. In the adjacent slides, several examples of improper finish grading are displayed. Of the many issues that are important, the single most important is the finish grade next to a house.
A negative slope towards a foundation will allow rain water to flow towards a house. This is not what you want around your home. As the soil becomes saturated next to the foundation, whether block or poured concrete, moisture through vapor pressure will move from a higher to a lower concentration. The lower concentration is the basement or crawl space.