Bowed walls are a serious problem in homes. When the outside pressure becomes too great, foundations can even crack or crumble, resulting in a collapse. While addressing this hazard is critical to keeping your property and its inhabitants safe, it may also be helpful to know what can cause bowing in the first place. Here are some of the most common culprits.

What Causes a Structure's Walls to Bow?

1. Tree Roots

Root systems from large trees can exert tremendous pressure on a home’s foundation. Even if a tree seems to be far enough away, it’s possible the roots can extend two to three times the radius of its canopy in ideal soil and moisture conditions. As they grow, their pressure may cause household walls to bow.

2. Prolonged Vibration 

Homes are built to withstand moderate and occasional vibrations. Yet, certain houses are subjected to prolonged periods of this phenomenon, including those that are built near highways, heavy traffic zones, train tracks, or areas where heavy machinery is present. The ongoing vibration can weaken the home’s structural integrity, leading to bowed walls.

3. Poor Construction

There are several construction-related factors that can cause walls to bow. For example, using the wrong size sill plate will create pressure on walls, as can backfilling before concrete has cured. Poorly constructed home additions can also add weight that causes bowing, and it can be problematic if walls are too thin.

4. Water Pressure

One of the most common causes of bowing walls is water pressure from moist soil that surrounds the home. Oftentimes, this occurs due to an insufficient drainage system on the property. For example, gutters and downspouts should direct water away from the home’s foundation to prevent saturation of the surrounding soil.

5. Shifting Soil

Certain types of soil are more prone to shifting than others. For example, loose soils and those that expand when wet, such as clay, can create lateral force on foundation walls. This can cause bowing over time. Before this problem occurs, you may also notice horizontal cracks that indicate higher-than-normal pressure from the surrounding earth.

No matter the cause of your bowed walls, The Dwyer Company can offer solutions. They serve clients throughout West Chester, OH, and Lexington and Louisville, KY. This geotechnical and structural specialty company offers a wide range of services for commercial and residential customers, including soil stabilization and foundation repair. Call (513) 777-0998 to request a free estimate, or learn more about the solutions they offer online.