Foundation Leveling Selma, TX.

If your doors bind shut in the damp of winter, then swing loose by August, the culprit usually isn't the house, it's the ground the house is sitting on. Across Selma, the flat lots that drain toward Cibolo Creek are built on deep clay that can carry a plasticity index north of 40, which is a technical way of saying the soil drinks in an enormous amount of water during the rains and then gives it all back during a Texas drought. Every time it does that, it lifts and drops whatever is resting on top of it.

That seasonal push-and-pull is what opens the stair-step cracks at your window corners and tilts a hallway floor toward one side of the house. Foundation leveling doesn't paper over those symptoms; it re-anchors the structure to soil that stays put. On a GroundLock project that means driving galvanized steel piers straight through the moving clay to load-bearing strata underneath, then lifting the foundation back onto them, and it starts with a free elevation survey that tells us exactly where the slab has gone.

Signs a Selma foundation has started to move

A few of these on their own are worth watching. Several together usually mean the clay is working against your slab and it's time for a survey.

• Interior doors that stick in winter and gap at the top or bottom by late summer
• Diagonal cracks running from the corners of windows and doorways
• A floor that slopes noticeably toward one edge of the house as you walk it
• Gaps opening where the exterior brick meets the soffit or where trim pulls from the wall
• Cracks in the perimeter grade beam or separation at a garage-door corner
• Standing water or soggy soil hugging the foundation after rain, common on Selma's creek-bottom lots

Why the clay under Selma moves the way it does

The soils in the Cibolo Creek corridor are alluvial and colluvial, layers laid down over centuries, and they behave nothing like the thin limestone soils out to the west. What matters for your foundation is the active zone: the depth over which soil moisture actually changes enough to make the ground swell and shrink. In this part of Bexar County that zone commonly reaches 8 to 12 feet, and deeper where a lot sits close to drainage or big trees.

That depth is the whole reason pier type matters. Pressed-concrete piers often terminate inside or just below the active zone, so as the soil keeps shifting around them, their support can drift. GroundLock's galvanized steel piers are driven hydraulically until they hit true load-bearing strata well beneath that zone. The Cibolo clays also tend to run high in sulfates, which chew through unprotected metal, so the piers are hot-dip galvanized to stand up to that chemistry for the long haul. If the broader problem is why the ground moves at all, our foundation repair overview walks through the mechanics in more detail.

Trees and water make the local picture worse. A mature live oak or cedar elm with roots reaching under the slab pulls moisture out of the clay during a dry spell, shrinking the soil in just that spot and tilting the house toward it. That's why leveling in Selma is never only about jacking the slab up, it's about reading the whole moisture story around the structure first.

How a leveling project actually runs

Is it settling, or is it heave?

The elevation contour does more than find the low spots, it tells us which direction the trouble is going. Perimeter settlement, where the edge of the house has dropped from loss of support, and interior heave, where swelling clay has pushed the center of the slab up, can look identical to a homeowner. They call for opposite fixes. Settlement is what piers are built to solve; heave often calls for managing moisture and monitoring before anyone lifts anything.

Getting that call right is where a lot of unnecessary repairs in this region come from. Without survey data, it's easy to pier a slab that actually needed its grade and drainage corrected. Speaking of grade: finished soil should fall at least six inches over the first ten feet away from the house, and on Selma's flat lots that target is genuinely hard to hit. Even partial regrading, paired with drainage improvements, cuts the volume of water saturating the clay right under your edge beam and helps whatever we pier stay put.

Most projects run somewhere in the $4,500 to $14,000 range depending on how many piers the plan calls for, how easy the access is, and what the drainage needs. The free survey locks that scope down to a measured number before any work starts, no guessing off where the cracks happen to show, and financing is available so the timing works for you. In most cases you and your family stay in the home while the crew works.

Selma foundation leveling questions