Foundation Leveling.

Which side of the escarpment is your house on?

Drive the corridor from San Antonio up to Austin and you cross the Balcones Escarpment, an old geologic seam that quietly decides how a foundation behaves. East of it lies the Blackland Prairie, where Houston Black clay carries plasticity index values that routinely run from 40 to over 60, soil that swells and shrinks with the seasons more violently than almost anything you'd build on elsewhere. West of the escarpment the story flips: thin residual soils sit on fractured Edwards limestone, so bedrock is shallow but maddeningly inconsistent, riddled with solution cavities and varying in depth across a single lot.

Leveling a slab without first knowing which regime you're in, and on plenty of properties, both apply to different corners of the same house, is how repairs look perfect through one wet fall and buckle the next spring. The reactive clay holds moisture under the center of a slab long after the exposed edges have dried and dropped, which is why so much of the differential movement we measure shows up at interior beams rather than the perimeter.

So before anyone talks about lifting your house, the real work is reading the ground underneath it. Center heave, edge settlement, and combined differential movement each call for a different pier count, a different layout, and a different target depth. Get that diagnosis wrong and you've bought a lift that the soil will simply undo.

A contour map of your floor, measured to 1/64 in.

Every leveling job here starts with a free elevation survey of the entire floor system, shot with a ZIPLEVEL PRO-2030 altimeter to within ±0.01 in. (1/64 in.). We record a grid of interior and perimeter points and turn it into a contour map of the slab, which tells us far more than the location of the lowest spot.

The shape of the distortion is the diagnosis. A smooth, gentle bowl reads as long-term uniform heave or settlement; an abrupt step across a line usually points to a soil transition, an old utility trench backfilled with permeable material, or a drainage anomaly funneling water to one side. That distinction changes the plan, so we let the numbers, not the cracks, decide where the piers go and how deep they're driven.

From the survey we build an engineer-backed written plan: pier locations, target depths, and a lift sequence that brings the structure back toward tolerance without overstressing beams or masonry that have spent years adjusting to the wrong position. Most leveling projects fall in the $4,500 to $14,000 range, financing is available, and your written estimate spells the scope out before any work starts.

Make the lift last after the crew leaves

A pier set to refusal holds its elevation, but the soil around it keeps cycling, and these habits keep that movement from finding the next weak point:

• Get water off the foundation first: grade soil and hardscape for at least 6 inches of fall over the first 10 feet, because a repair fighting the same moisture gradient that caused the settlement is fighting uphill.
• Run a soaker hose 18 to 24 inches out from the perimeter during dry spells to flatten the shrink-swell cycle in our high-PI clay and protect the corrected elevation.
• Read interior cracks directionally, a diagonal running up toward a corner usually means that corner dropped, while a crack widest at the top of a door often means the lintel zone rose relative to the pier lines.
• Insist on depth, not just lift: a pier that stops short of competent strata and end-bears in still-reactive clay will ride the seasons, so ask for the drive pressure and refusal depth logged for each one.
• Expect a short settling-in period; hairline cosmetic cracking at old mortar joints or drywall tape is normal as the house adjusts, but anything that widens or spreads afterward warrants a follow-up survey.
• Pair the structural fix with whatever water-management work the survey flags, drainage correction or erosion control where it genuinely protects the foundation, never as filler.

Questions homeowners along the corridor ask us