Slab Foundation Repair San Antonio, TX

Most San Antonio homes sit on slab-on-grade foundations poured directly on expansive clay soil. When that clay swells and shrinks, your slab moves, and everything above it follows.

Signs Your Slab Needs Repair

• Cracks in drywall, especially around doors and windows
• Doors and windows that stick or won't close
• Floors that slope or feel uneven
• Exterior brick cracks in a stair-step pattern
• Gaps between walls and ceiling
• Garage slab separating from the house or pulling away from driveway

Why North & East SA Is Hit Hardest

Smectite-rich clay dominates north and east San Antonio: Stone Oak, Converse, and the I-35 corridor. This soil absorbs water like a sponge, then cracks when it dries. Slab homes built between 1960 and 1990 on minimal footings are especially vulnerable.

Post-tension slabs from the 1990s–2000s building boom are not immune. Cables hold the concrete together, but perimeter settlement still cracks brick, twists door frames, and separates garage slabs. An elevation survey shows where corners have actually dropped, not just where drywall cracked.

Push Piers vs. Helical Piers

Steel push piers are driven through unstable clay until they seat on load-bearing soil or rock, the standard fix for San Antonio perimeter settlement. Helical piers screw into place and work well when access is tight or loads are lighter. We do not sell one system for every house; the elevation survey picks the method.

Polyurethane injection fills voids and lifts slabs that have only minor settlement, often under an inch. It is faster and cheaper than piering when the slab has stopped moving. If cracks reopen after every rain cycle, the slab is still active and piers are the permanent answer.

Our Slab Repair Process

We start with a free elevation survey to map exactly where your slab has moved. Then we install steel push piers or helical piers driven to stable soil below the clay layer. For minor settlement, polyurethane injection lifts the slab without excavation.

Every job includes a written warranty and a final elevation check. Most residential slab repairs in San Antonio take 1–3 days depending on pier count and access. You can stay in the home while we work along the exterior perimeter.

Preventing Future Settlement

After repair, consistent moisture matters. Soaker hoses 12–18 inches from the foundation during drought months slow clay shrinkage. Proper grading and gutters keep water from pooling at the slab edge during storms. We include maintenance guidance in your report. Prevention is cheaper than a second lift.

Slab vs. Pier and Beam: Which Do You Have?

Slab-on-grade means your floor sits directly on a concrete pad with no crawl space. If you have a raised floor with a crawl space underneath, you likely need pier and beam repair instead. Not sure? Our free inspection identifies your foundation type in the first 30 minutes.

We stabilize slabs weekly in Stone Oak, Converse, and Cibolo. When corners have dropped, pair piering with house leveling for a level finish at door frames and floors.

Call (830) 244-0222 for a same-day inspection in San Antonio. We serve Bexar, Comal, and Kendall counties.