Slab Foundation Repair Lakeway, TX.

What a moving slab looks like on a Lakeway hillside lot

On a sloped lot the symptoms cluster on one side of the house rather than spread evenly. These are the patterns that bring us out most often:

• A door or two on the downhill side that suddenly drags or won't latch while the rest of the house feels fine
• Diagonal drywall cracks fanning from window and door corners toward the low end of the lot
• A gap opening between the slab edge and the brick veneer, usually at the low corner first
• Stair-step cracks in exterior brick or block mortar that widen after a wet winter
• Floor tile splitting in a line, or floors that pitch toward one room
• Cracks in the slab or across the garage floor where the pour meets the driveway

Why slabs move here, and why it isn't the usual Blackland clay story

Lakeway sits on the dissected limestone terrain of the eastern Edwards Plateau, where the land pitches sharply along the creek drainages feeding Lake Travis, a different problem from the flat Blackland Prairie east of Austin. The limestone is hard and incompressible, so the trouble isn't deep settlement; it's the thin clayey residual soils and caliche filling the joints, solution cavities, and weathered pockets in the rock.

Those residual clays are active: in the clay-filled fractures of this geology, plasticity indices of 25 to 45 aren't unusual, so the soil swells and shrinks with every wet-dry cycle. On a sloped lot that creates a moisture gradient, the uphill side stays dry while the downhill side collects runoff and subsurface flow along the bedrock joints. One zone expands while another contracts, and the slab is bent in a way it was never designed to carry.

The result is differential support. One corner may rest on rock while another spans a pocket of moving soil, so the tell is almost always a single racked corner or sticking door long before the whole house reads off-level, which is why we start with a measurement, not an opinion.

Galvanized steel, driven to the rock that doesn't move

Because Lakeway lots often expose competent Edwards limestone at shallow to moderate depth, the goal isn't to reach a deep stratum, it's to anchor through the unstable overburden into rock that ignores seasonal moisture. We drive galvanized steel piers hydraulically, reading resistance at every inch. When a pier hits consistent refusal in sound limestone, that becomes its bearing point, below the active soil zone.

We use galvanized steel for a local reason: limestone groundwater here runs mildly acidic, and galvanized resists that far better than bare steel across the decades a foundation repair is meant to last. We avoid concrete and pressed piers, which tend to stop short inside the same moving clay.

Pier spacing follows tributary load, not a fixed rule, a beam-on-grade run carrying brick veneer needs piers closer together than a lightly loaded interior slab. Most homes stay occupied throughout. Typical projects run $4,500 to $14,000 depending on pier count, access, and drainage, and the stabilization carries a lifetime warranty that transfers to the next owner.

How a Lakeway repair actually goes

Questions Lakeway homeowners ask us