What Landscaping Changes Prevent Foundation Water Damage?

Your foundation needs the ground around it to slope away, not toward the house. A slope of about six inches over the first ten feet gives water a clear path to drain off. You can check the slope with a long level or a string line. If the ground dips toward the house, add fill soil to raise it.

Use clean, compactable soil, not loose mulch or sand. Compact the soil lightly to prevent settling. After heavy rain, check the slope again because soil can shift. The rainy season will test any low spots quickly.

Gutters and downspouts can dump a lot of water right next to your foundation. Extend each downspout at least five feet away from the house. Use a flexible extension or a buried pipe that carries water to a safe drainage area.

Make sure the extension slopes downward so water doesn't pool at the end. In areas with heavy downpours, short extensions can be overwhelmed. A longer run or a dry well can handle the volume. Check the extensions each season for clogs or damage.

If water pools in your yard even after grading, a French drain can help. This is a trench filled with gravel and a perforated pipe that redirects water away from the foundation. It works well when the trench slopes away from the house to a lower area.

Digging a French drain is labor-intensive, so you may want to hire a pro. The cost often depends on the length of the trench, the soil type, and how deep you need to go. A well-placed drain can help prevent recurring seepage into a crawlspace or lower level.