What Is the Relationship Between Landscaping and Home Flooding?

The slope of your yard, known as grading, is the most critical landscaping factor. If the ground slopes toward your home, rainwater and runoff will flow directly to your foundation. Over time, this water can seep into basements or crawl spaces, causing significant damage. Proper grading slopes away from the house, guiding water toward storm drains or other safe drainage areas.

You can check your home's grading with a simple level. Place it on the ground next to your foundation. If it tilts toward your house, you likely have a grading issue. Correcting this often involves adding soil to create a gentle slope away from the foundation for at least the first ten feet. This is a fundamental flood prevention step.

The plants and materials you use in your yard influence water absorption. Large paved areas, like patios and driveways, create impermeable surfaces that increase rapid runoff. This runoff needs somewhere to go, and without proper planning, it often flows toward the house. Using permeable pavers or gravel for walkways allows some water to soak into the ground instead.

Your plant selection also matters. Lawns and shallow-rooted plants absorb less water than deep-rooted native shrubs and trees. In wet climates, choosing plants that thrive in moist soil can help manage groundwater. Conversely, planting water-hungry vegetation too close to your foundation may require excessive watering, which can soften the soil and contribute to foundation issues over time.

• Avoid planting large shrubs or trees directly against your foundation.
• Use mulch beds to help absorb rainwater, but ensure they are graded away from the house.
• Create swales, which are shallow ditches, to channel runoff along a desired path in your yard.
• Keep soil around your foundation bare or with very light ground cover to easily monitor for cracks or settling.
• Regularly clear leaves and debris from drainage paths and basin inlets to prevent blockages.
• Inspect and maintain any retaining walls, as a failure can release a large amount of soil and water.

Despite best efforts, heavy rain or rapid snowmelt can overwhelm even good landscaping. If water enters your home, your priority is to stop the flow and remove the water quickly to limit damage. Shut off electricity to affected areas if safe to do so, and move valuables to a dry location. Then, contact local water damage pros for water extraction and drying.

The pros use industrial equipment like pumps, extractors, air movers, and dehumidifiers to dry the structure. They also check for hidden moisture in walls and under floors using tools like moisture meters. This thorough drying is essential to prevent secondary damage like mold growth and wood rot. Leaving water to sit often leads to more extensive and costly repairs later.