Slab Foundation Repair Seguin, TX.
Seguin sits on deep Guadalupe River clays that swell wet and shrink dry, and a slab riding that soil moves with it. We measure the movement to ±0.01 in. first, then drive galvanized steel piers past the clay to soil that stays put.
How a Seguin slab repair actually goes
Elevation survey, free and to the 64th of an inch
We shoot the whole slab footprint to ±0.01 in. so we can see exactly where it has dropped, where it's still supported, and whether a "high" spot is really a lifted section held up by interior beams.
Read the shape before specifying anything
A perimeter that has settled points to perimeter piers; a slab domed at the center usually means interior clay swell, which needs drainage corrected before any pier goes in the ground.
Drive galvanized steel piers past the active zone
Piers are pushed hydraulically section by section until they hit competent load-bearing strata below the 10-to-15-foot active zone, not just to the bottom of the soil that moves less.
Transfer load and lift back toward level
Once refusal is reached, the slab's weight moves onto the piers and we lift on a controlled sequence so elevation is restored without over-stressing the concrete.
Why Guadalupe River clay is the whole story here
The subsoil under most of Seguin is alluvial clay laid down by centuries of Guadalupe River flooding. It's high-plasticity material, plasticity index values commonly run past 40, which is engineering shorthand for soil that expands hard when it's saturated and contracts sharply through a Texas drought. A slab sitting on it is riding a slow tide: the clay pushes up in the wet months, then pulls back and leaves voids as things dry out.
That push-and-retreat rarely happens evenly. One corner settles while another holds, and the concrete cracks along its weakest grid lines while door frames rack out of square. The fix isn't chasing the surface symptom, it's getting the load down to a depth where seasonal moisture no longer has any say. Around here the active zone reaches 10 to 15 feet, deeper where the clay is thick and poorly drained, so piers anchored only to the bottom of that zone are a shallow answer to a deep problem.
GroundLock's steel piers are driven straight past the active clay to strata that doesn't cycle with the weather. Pressed-concrete piers often stop short inside the moving soil, which is why they're a poor match for this ground. If drainage is feeding the problem, correcting how water moves around the slab is part of the plan, see our drainage and erosion-control work, because piers stabilize the structure but water is what wakes the clay up.
The survey drives the price
Most Seguin steel-pier projects land between $4,500 and $14,000, set by pier count, access, and how much drainage work the soil needs. The free elevation survey locks that scope into a measured, fixed number before anyone breaks ground.
Financing is available, the warranty is lifetime and transferable to the next owner, and most homes stay lived-in while the crew works.
What you can do to slow the movement
You can't change the clay, but you can steady the moisture that drives it while you weigh your options:
- Grade for drainage, the ground should fall at least 6 inches over the first 10 feet from the slab so rain sheds away instead of pooling at the stem wall.
- Run a soaker hose in drought, set it 18 to 24 inches out and keep it on a steady schedule so the clay doesn't dry fast and pull away from the beams.
- Give big trees room, mature live oaks and cedar elms pull a lot of moisture; keep them back at least half the canopy spread from the slab edge.
- Send downspouts away, concentrated gutter discharge soaks a narrow band of clay and speeds heave right under the vulnerable perimeter corners.
- Watch cracks by season, a crack that opens in summer and closes in winter is moisture cycling; one that keeps growing in one direction usually means real settlement.
Seguin slab repair, answered
What should I expect to spend on slab repair here in Seguin?
Will you come out to my part of Seguin?
Why steel piers instead of the concrete kind for our clay?
Some doors stick every summer, is that just normal Seguin movement?
What's actually causing my foundation to move?
How many piers is my house going to need?
Is the free inspection genuinely free, or is there a catch?
Book your free
foundation inspection.
Tell us where you are and what you’re seeing. A GroundLock structural advisor confirms within one business hour.
All foundation services in Seguin
Every GroundLock service, available throughout Seguin and the surrounding area:
Get your free foundation inspection.
A licensed inspector measures your slab elevation to ±0.01 in. (1/64 in.) and gives you a written, engineer-backed plan with zero pressure.