Foundation Inspection Cibolo, TX.

Homes on the Cibolo Creek floodplain sit on some of the most reactive ground in Central Texas. The high-plasticity clays here, vertisols rich in montmorillonite and smectite, with plasticity indices that can run north of 40, swell when a wet spring soaks them and shrink when a Guadalupe County summer bakes them out. The soil under a slab can travel two inches or more vertically in a single season, and that movement is what cracks brick, racks door frames, and tips floors out of plane.

The trouble is that you cannot judge any of that by eye. A hairline crack over a window might mean nothing, or it might be the visible end of a slab that has dropped two and a half inches at one corner. A Cibolo foundation inspection exists to replace that guesswork with measurement, a precise elevation survey and a written, engineer-backed report you keep, whether or not you ever pick up a phone to schedule work.

What the elevation survey actually measures

The core of every GroundLock inspection in Cibolo is a precision elevation survey accurate to ±0.01 in. (1/64 in.), captured with a ZIPLEVEL PRO-2030 high-precision altimeter. Rather than a rough visual impression, the survey produces a quantitative deflection profile, the true plane of your slab read across a grid of reference points, room by room.

The shape of that profile tells the story. A broad, bowl-shaped dish toward the center of a home usually points to interior moisture loss while a rigid perimeter holds; a sharp drop isolated to one corner more often traces to a localized drainage defect, a thirsty tree root, or a slow plumbing leak feeding moisture into one stretch of clay. Reading the pattern alongside the magnitude is how an inspector separates seasonal cosmetic movement from genuine structural settlement.

That distinction drives the recommendation. The same half-inch reading can mean monitor and correct the drainage on one home and install piers now on another, depending on where the low points fall and how the structure is framed above them. Without the numbers, no one can honestly tell you which it is.

How a Cibolo inspection runs, start to finish

What the inspector reads inside and out

Beyond the survey grid, a Cibolo inspection cross-checks the symptoms that tend to show up first on floodplain clay:

• Crack geometry, stair-step cracks climbing brick mortar joints at roughly 45 degrees off a window or door corner signal differential settlement; horizontal cracks in a brick course point instead to lateral soil pressure and a different fix.
• Door and window binding, a door that catches at its top corner, especially on the measured high side, reflects beam distortion from localized settlement rather than uniform shrinkage.
• Floor slope and trim gaps, a continuous gap between baseboard and flooring, or a slope you can pick up with a level on multiple axes, ties the visible symptom back to the center of movement on the survey.
• Drainage and grade, the ground should fall at least six inches over the first ten feet away from the foundation; beds, sprinkler heads, and downspouts inside that band are the usual culprits behind one-sided moisture loading here.
• Hidden plumbing leaks, even a slow slab leak swells the clay under one part of the beam while the rest stays dry, an asymmetric heave the elevation survey can flag before the leak ever surfaces.

Cibolo foundation inspection questions