Naturally your home is sitting on the ground but the type of soil plays a major role in the effects it can have on your foundation. Depending on whether the soil is made up of clay, sand, loam, or silt will determine how the ground reacts to dry and wet environments as well as to the weight of your home. Seasonal changes will make some types of soil shrink or swell more than others and when those fluctuations occur beneath the foundation of your home, it can cause damage.