Foundation Inspection Lockhart, TX.

Why an inspection here isn't a quick walk-around

The Houston Black clay under most of Lockhart is some of the most active soil in Caldwell County, with a plasticity index that commonly tops 40 and an active zone that can run 10 feet or more below grade before the moisture settles down. That changes what an honest inspection has to do. Reading cracks off a clipboard tells you little; the soil moves several inches as it wets and dries, so the only way to know what your foundation has done is to measure it.

GroundLock's inspection is built around that measurement. A licensed inspector maps the whole footprint with a ZIPLEVEL® PRO-2030 altimeter, perimeter, interior load-bearing walls, and grid points, to ±0.01 in. (1/64 in.). The shape of that surface is what an engineer reads: a perimeter dropping away from the center points to edge-lift collapse, the most common failure mode in Blackland clay, while a heaved interior usually means moisture has been trapped under the slab.

The visible signs get checked against that map, not read on their own. A stair-step brick crack widening toward the top suggests a corner dropping; one opening toward the bottom more often means heave. Bouncy floors can flag a void where clay has shrunk away from the concrete. None of it is a verdict by itself, it's evidence weighed against the numbers.

What the elevation survey is really telling us

Magnitude matters less than pattern. Two homes can both show an inch and a half of deflection, but a clean slope toward one corner and a saddle through the middle are different problems with different fixes. A perimeter-only reading misses interior heave, which is why the survey includes load-bearing walls inside the home, the contour, not just the high and low numbers, drives the recommendation.

Crack width is a poor severity gauge on high-plasticity clay. A hairline that's still moving with the seasons can matter more than a wider crack that's been stable for years, and the elevation data is what separates the two, it also shows whether the slab is still moving or has found a temporary equilibrium between the wet and dry cycles of a Central Texas year.

The survey doubles as a baseline. Because Lockhart's clay stays active for the life of the structure, a measured starting point on paper means future movement can be checked against real numbers instead of memory, useful for you, and for the next buyer who asks about the foundation.

How a Lockhart inspection runs

What the written report actually covers

This is a documented engineering plan, not a verbal estimate or a one-page pier count:

• The full elevation survey, with high and low points and the contour between them
• The probable mechanism, edge-lift, center heave, or a localized drainage issue, behind the movement
• Drainage and grading corrections worth doing whether or not pier work follows
• Pier locations and the target load-bearing stratum below the active clay zone, where piers are recommended
• A measured baseline you can hand to a lender, buyer, or insurer later
• A clear scope and price range up front, typically $4,500 to $14,000 for projects that need piers

Lockhart foundation inspection questions