Expansive soils contain minerals that absorb a great deal of water. When they absorb water, they increase in volume. The more water that they absorb, the more their volume increases. Clay soil expansion can range between 10 and 20% in the Henderson area. This change in volume can exert enough force on a building or other structure to cause damage.
Cracked foundations, floors and basement walls are typical types of damage done by swelling clay soils, also called expansive soils. Damage to the upper floors of the building can occur when motion in the structure is significant, as well as foundation cracking and bowing walls.