Did you know that some soils act like a sponge? The more water certain types of soils absorb, the more those soils increase in volume (size). There are many terms that refer to these types of soil: expansive soils, expandable soils, expandable clay, shrink-swell soils (say that three times fast!). Whatever name is applied, expansive soils are ubiquitous across North America and cause billi...