Improper downspout drainage is one of the most common—and overlooked—issues identified during home inspections. When roof runoff is discharged too close to the foundation, it can lead to a range of problems that impact both the structure and long-term durability of a home.

Downspouts are designed to safely direct rainwater away from the structure. When they terminate at the foundation or discharge directly onto the soil, water can pool at the base of the home. Over time, this excess moisture may contribute to soil erosion, foundation settlement, basement or crawlspace water intrusion, and damage to exterior materials.

In areas with clay or poorly draining soils, the risk is even greater. Saturated soil expands and contracts, increasing stress on foundation walls. In colder climates, trapped moisture can also contribute to frost heave and cracking.

During a professional home inspection, improper downspout discharge is typically documented as a drainage defect. A common recommendation is to extend downspouts several feet away from the foundation using approved extensions or to connect them to a properly designed underground drainage system. These corrections are usually straightforward and cost-effective when addressed early.

Proper drainage management plays a critical role in protecting the structure of a home. Addressing downspout issues helps reduce moisture-related risks and supports the long-term performance of the foundation and surrounding components.

If you are buying, selling, or maintaining a home, a thorough inspection can help identify drainage concerns before they become costly repairs.