books.google.com - How does a homeowner determine whether or not his/her home is constructed on expansive soils? What are expansive soils, and what causes these soils to shrink or swell? Does the type of foundation affect the performance of a house constructed on such soil? How does lot drainage affect the performance...http://books.google.com/books/about/So_Your_Home_Is_Built_on_Expansive_Soils.html?id=1f4rVyk6O20C&utm_source=gb-gplus-shareSo Your Home Is Built on Expansive Soils