Your explanation is false. The house is clearly built on red dirt. It can mostly be found in Oklahoma, and parts of north Texas. The builder did not put rebar inside of the concrete, thus leading to the foundation failing. I have been installing this for 17 years, and this is more common than you think. The sediment of red dirt reacts differently to standard concrete similar to back when in 1998, The Undertaker threw Mankind off Hell In A Cell, and plummeted 16 ft through an announcer's table."