How to Divert Rainwater Away from Your Foundation

Water is the single most destructive force acting on your home. When rain pours off your roof and collects against your foundation walls, it creates hydrostatic pressure that leads to basement leaks, cracked masonry, and shifted footings. A home that stays dry is one that manages water movement with gravity rather than fighting it. Effective water diversion is rarely about a single fix; it is a system of shedding water away from the structure until it reaches a low-lying area or storm drainage. When done well, you should see zero ponding or saturated soil within five feet of your house after a heavy rain. This project focuses on the low-effort, high-impact mechanical and landscape adjustments that protect your largest investment.

Clear and Extend Downspouts. Clear all debris from your gutters to ensure water reaches the downspouts freely. Attach plastic or metal extensions to the base of each downspout so water discharges at least six feet away from the foundation wall.
Read Your Yard's Natural Slope. Check the slope of the ground immediately adjacent to your foundation. The soil should slope away from the house at a drop of one inch per foot for the first six feet.
Fill Foundation Low Spots. Fill in any depressions or 'birdbaths' near the foundation with topsoil. Pack the soil firmly and ensure the surface remains angled away from the house structure.
Position Splash Blocks Perfectly. Place durable concrete or plastic splash blocks under every downspout extension. Position them so the water flows over the block and onto the sloped ground beyond the foundation.
Build a Dry Creek Bed. If water naturally pools in your yard, dig a shallow, wide trench lined with river rock to act as a dry creek bed. This guides surface water toward a drainage point or street gutter.
Test Your Water Diversion System. Inspect your work during the next rainstorm to identify any remaining puddles. Adjust the grade or extension length if water still collects near the building footprint.