Foundation Inspection Boerne, TX.

Boerne sits right where the geology changes its mind. Cross the Balcones Escarpment and the deep Blackland clays of the flatlands give way to thin, patchy soils laid over fractured Edwards limestone. That shift is why a foundation inspection here has to do more than count cracks in the brick. It has to read what the rock and the clay are doing beneath the slab, lot by lot.

The clay layers in Kendall County are usually shallower than the Houston Black clays east of the escarpment, but shallow doesn't mean gentle. When those thin clay pockets dry out in summer, they pull away from the slab wherever the clay runs out and the limestone begins, and those transitions are anything but even. The result is differential movement: one corner drops while the section next to it sits firm on rock. An accurate survey is the only way to see that pattern instead of guessing at it.

What the elevation survey actually measures

A licensed inspector walks a grid of shots across your floor, interior and exterior, using a ZIPLEVEL PRO-2030 high-precision altimeter to read slab elevation to ±0.01 in. (1/64 in.). Those readings get plotted into a contour map of your foundation, the same way a topographic map shows hills and valleys. The low spots, the high spots, and the tilt all show up as numbers rather than impressions.

On Boerne's mixed terrain, the interior shots matter as much as the perimeter. Exterior brick can look alarming while the slab inside stays nearly flat, or the reverse, a soft pocket can hide under carpet or tile with no warning at the wall. Without a full interior grid, there's no way to know whether a clay pocket has lost contact beneath a covered floor.

The survey also reads the geometry of the cracks it finds: vertical offset versus horizontal pull, taper direction, and whether rust staining suggests water has been working through the crack plane for years. A crack that opens every August and closes by November leaves a telltale spalled edge that separates ordinary seasonal cycling from settlement that's actually progressing.

What the inspector documents on a Boerne lot

Beyond the elevation grid, a few things specific to thin-soil, rocky terrain get noted in your report:

• Grade and fall around the perimeter, the benchmark is six inches of drop across the first ten feet, but shallow bedrock on hillside lots often makes that hard to grade, so the inspector flags where water pools or sheets toward the beam.
• Irrigation setbacks, over thin clay there's no buffer, so soaker hoses and drip lines should sit at least 18 to 24 inches off the perimeter beam; lines run too close get noted.
• Hollow or soft floor zones, tapped during the interior walk, because a supply or irrigation leak under a slab can saturate one clay pocket and mimic pier failure.
• Crack character, stair-step patterns in masonry, diagonal cracking at window and door corners, and whether the displacement is one-sided.
• Expected pier depths, where movement warrants repair, the report estimates how far galvanized steel would need to drive through fractured limestone before hitting solid refusal.

How the inspection runs, start to report

Boerne foundation inspection questions