In Texas, soil types can include blackland clay, sandy loam, sand, yellow clay, and alluvial soil, just to name a few. You can have it tested by an organization, such as the Texas A&M AgriLife Extension program or the Texas Plant and Soil Lab. Dallas sits in the Blackland Prairie zone, which is characterized by deep, dark-gray to black alkaline clays. The soils here are called “cracking clays” because they form deep cracks in dry weather. That means there’s a high chance of shrinking and swelling, which can severely damage foundations and other structures.
Under moderate weather conditions Texas soils (including the various clay types) aren’t necessarily more temperamental than other types of soil. Seasons of excessive rain or extreme heat and dryness do, however, cause expansive clay soils to enlarge and contract, which can cause significant foundation damage. Residences featuring a slab foundation consist of a layer of concrete poured over a framework of reinforcing steel, commonly known as re-bar. Repairing a slab foundation typically involves the installation of “footers” or “beams,” which are trenches excavated into the ground to enhance stability. Concrete slab foundations are prevalent in many newer homes constructed since the late 1960s.
The soil in Texas is known for its high clay content, which can cause it to expand and contract significantly. During drought, the soil can dry out and shrink, leading to foundation settling and cracking. The benefits of a concrete slab foundation include reduced vulnerability to flooding, fewer mold concerns compared to homes with crawl spaces, and a lower overall elevation from the ground.
While slab foundations come with numerous benefits, they are susceptible to certain issues. Regular inspections and prompt repairs are essential for maintaining both the concrete foundation and the overall condition of your home.
