House Leveling Burnet, TX.

Why Burnet slabs settle unevenly

Burnet sits in the Hill Country transition zone, where the ancient granite of the Llano Uplift meets fractured Edwards limestone. Instead of the deep, uniform clays you'd find on the Blackland Prairie to the east, a typical lot here has thin topsoil over wildly variable bedrock, granite outcrops, decomposed-granite (grus) zones, and clay-filled limestone fractures, all at different depths within the same footprint.

That patchwork is the whole problem. One corner of a foundation may bear on solid granite eight inches down while another floats over a residual-clay pocket that compresses under load. The slab doesn't sink as a unit; it moves differentially, and that's what produces the stair-step brick cracks, racked doors, and sloping floors homeowners around Burnet recognize.

Moisture still plays a role even without extreme clay. The residual clays trapped in granite joints and limestone fractures here run moderate to moderately high plasticity, PI values commonly in the 20 to 40 range, enough to shrink and swell through Central Texas's wet springs and long summer droughts, and enough to drop a corner that was already short on bearing.

What we look for on a Burnet lot

Before we ever talk about piers, our inspector reads the site for the specific things that drive movement in granite-and-limestone country:

• Stair-step and diagonal cracks through brick mortar that widen at the top, the signature of one zone bearing differently than the one beside it.
• Grade and fall away from the slab, we want at least six inches of drop across the first ten feet, and on steeper lots we look at whether water is undercutting the uphill side.
• Deep-rooted trees within 15 to 20 feet, live oaks and similar species chase the clay pockets in rock joints and can pull enough moisture to shrink a fracture localized under one corner.
• Exposed foundation beam from slope erosion, once soil cover washes off a downhill face, the beam cycles harder through heat and moisture.
• Cut-and-fill construction, engineered fill consolidates at a different rate than the native rock beside it, which shows up as isolated settlement.
• Inconsistent depth-to-rock, bedrock can vary several feet within one lot, so we never assume a neighbor's pier depth applies to yours.

Driving piers to rock you can actually trust

The trick in this terrain isn't finding hard ground, it's finding competent ground. Weathered granite and solution-widened limestone can feel solid and still be deceptively soft, so a pier that stops at the first hard layer may be anchored to a thin shelf rather than a true load-bearing stratum.

Our galvanized steel piers are driven hydraulically under the structure's own weight until each one hits measurable resistance at competent strata, bypassing the shallow weathered zones. Because every pier is driven individually to refusal, the system self-calibrates to the actual subsurface at each point along the perimeter instead of trusting one generalized depth for the whole house.

Once the supports are in, we raise the slab back toward its original elevation in controlled increments and transfer the load onto steel, so the level holds through the next drought and the next downpour. Most projects run $4,500 to $14,000 depending on pier count, access, and drainage, the work carries a lifetime transferable warranty, financing is available, and you can usually stay in the house while we work. Where water is the underlying driver, we'll pair the lift with drainage correction only where it genuinely protects the foundation.

Burnet house leveling questions