Foundation Repair in Shavano Park, TX

Shavano Park sits at the far southeastern reach of the Texas Hill Country, at roughly 950 to 1,000 feet above sea level. Unlike the steep terrain just north of Loop 1604, where hills can climb 200 feet in a short distance, the ground inside the city is flat to gently rolling. That mild surface hides a difficult transition underneath. This part of north Bexar County is where the limestone of the Edwards Plateau country gives way to the clays that dominate the land south and east of San Antonio, so a Shavano Park foundation can rest on a thin blanket of soil over hard rock at one end and a deeper pocket of expansive clay at the other.

That split personality is the root of most foundation trouble here. The clay pockets swell after heavy rain and shrink hard during Central Texas droughts, while the rock-supported sections barely move at all. The house hinges between the two, which is why so many Shavano Park slabs crack along a line rather than settling evenly. The east side of the city adds its own wrinkle, where the land forms a low plateau ending in a bluff that drops fifty feet or more at the San Antonio boundary, and lots near that edge shed storm water fast enough to erode the soil supporting nearby foundations.

The mature live oaks that give Shavano Park its character play a part too. On a half acre lot, a large oak can pull hundreds of gallons of moisture out of the soil during a dry summer, drying out the clay under the nearest edge of the slab and dropping that corner of the house. Piers seated on the limestone below the clay, paired with drainage that keeps soil moisture steady, take all of that seasonal movement out of the equation.