Your home rests on a foundation, which rests on the ground beneath it. That means, your home’s foundation is only as stable as that ground. You might think that “solid” ground is just that — solid. But, the ground beneath your home is actually made up of many different layers of soil, each with its own properties, such as moisture content, density and material type (silt, clay, sand, gravel, etc.). Over time, these layers can shrink and consolidate, causing your home’s foundation to settle and crack.