Slab Foundation Repair Olmos Park, TX.
Olmos Park sits right on the Balcones Escarpment, where deep prairie clay meets shallow limestone, and that split is exactly why slabs here crack the way they do. Here's how we measure it and fix it for good.
How a slab repair here actually gets planned
Free ±0.01-in. elevation survey
We shoot the whole slab surface to 1/64 of an inch so you see the real topography, which corners dropped, which rose, before anything is designed or priced.
Engineer-backed repair plan
The survey plus a look at your soil conditions tells us how many piers you need, where to set them, and what depth to target at each point.
Galvanized steel piers, hydraulically driven
Piers are pushed to refusal on load-bearing strata beneath the active clay, and the drive system reads resistance at every location to confirm bearing before it's locked off.
Lift, lock, and a written warranty
We raise the slab back toward level, secure each pier, and hand you a lifetime transferable warranty on the piered sections.
Why one house in Olmos Park moves two different ways at once
Most neighborhoods sit on one kind of soil. Olmos Park doesn't. You're on the escarpment edge, where the deep Blackland Prairie clays to the east give way to thin, patchy soils draped over fractured Edwards limestone to the west, and a single slab often bears on both. One corner rides high-plasticity clay that swells and shrinks with every wet and dry cycle; another corner sits almost on rock and barely moves at all.
That contrast is the real culprit behind the diagonal cracks, the door that suddenly won't latch, and the floor that feels like it tilts toward one room. It isn't total settlement doing the damage, it's differential movement. A slab founded partly on compressible clay and partly over a limestone shelf rotates rather than settles evenly, and stress piles up right along that clay-to-rock transition line, which is exactly where structural cracks start and spread.
During a hard Central Texas drought the active zone, the depth where seasonal moisture actually changes soil volume, can reach below your grade beams and pull support out from under them. When the rain returns, the clay swells back unevenly. Driving piers to some arbitrary depth doesn't solve that. The pier has to pass completely through the moving material and seat on competent strata below the reach of seasonal moisture. Our foundation repair approach is built around finding that depth pier by pier.
Total settlement isn't the number that matters
A slab that dropped two inches in one corner and rose half an inch in another needs a very different plan than one that settled uniformly.
That's why the free elevation survey comes first, it shows the full shape of the movement, not just the low spot, so the repair is engineered to what your slab is really doing.
What keeps an Olmos Park slab stable after repair
Piers carry the load, but a few habits protect the soil around them so the movement doesn't come back:
- Read the differential, not just the drop, the survey reveals whether one corner sank, another heaved, or the middle deflected, and each calls for a different fix.
- Keep slab moisture steady, a soaker hose 12 to 18 inches off the perimeter, run consistently through dry spells, softens the shrink-swell swing in the active zone.
- Slope the grade away, aim for at least 6 inches of fall over the first 10 feet so water doesn't pond against grade beams and soak the subgrade unevenly.
- Watch for mid-span dip, if the floor sags toward the center, perimeter piers alone can't lift it; interior support may be needed where clay has consolidated or voids have opened.
- Handle water at the source, pair the piers with sound drainage and erosion control so runoff stops feeding the very clay that's moving your foundation.
Olmos Park slab repair questions, answered
What will slab repair run me on a house like mine near the escarpment?
Are you actually working in Olmos Park, or just the wider San Antonio area?
Why steel piers instead of the concrete ones I keep hearing about?
How many piers is my slab going to need?
Do we have to move out while you work?
Should I be watering my foundation during a dry summer?
Once it's fixed, can it just move again?
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 Olmos Park
Every GroundLock service, available throughout Olmos Park 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.