Expansive soils are known to be present in every US state and throughout the world. Every year expansive soils contribute to billions of dollars in damage to homes. In a typical year expansive soils cause greater financial loss to property owners than earthquakes, floods, hurricanes and tornadoes combined. The proper design and care of your foundation is very important to preserving the integrity of your home.
Foundation watering through the use of soak-er hoses has become very important in an attempt to preserve the integrity of your home. Some clayey soils have the ability to shrink or expand at alarming rates, depending on the moisture content of the soil and weather patterns. The goal for proper foundation maintenance should be to maintain a consistent level of moisture in the soil thus eliminating swelling and shrinking of the soil that is supporting your foundation.
The Causes of Foundation Watering and Expansive Soil
If the soil around the exterior of the home becomes excessively dry, it will shrink leaving a gap between the soil and the foundation. These cracks allow additional evaporation and more cracking deeper in the soil. When heavy rains happen, these cracks allow excessive amounts of water to penetrate soil layers causing swelling of the clay soils that are intended to support the foundation. This rapid expansion can cause settlement, foundation cracking, drywall cracking and the need for foundation repairs.