Foundation Inspection Converse, TX.

Reading the slab before you spend a dollar on it

An inspection in Converse has to answer a harder question than "is the foundation cracked?" The eastern edge of town drains slowly across heavy clay following the Cibolo Creek tributaries, while ground a little to the west sheds water fast. That split is why a house here can look fine for years, then heave several inches in the days after one heavy storm. A walkthrough alone cannot separate a slab that is genuinely failing from one that is simply riding the wet end of a seasonal cycle.

The centerpiece of every GroundLock visit is a ±0.01-in. (1/64-in.) elevation survey taken across the full footprint with a digital level and a grid of interior points. The technician walks the slab, shoots a reading at each station, and builds a contour of how the floor actually sits today. That map is what turns vague complaints, a door that drags, a hairline in the drywall, into a number you can act on.

What the survey is really sorting out is which way the slab has deflected. Center-dome heave, where clay under a long-dry interior pushes the middle up while the edges drop, looks almost identical from inside the house to perimeter sag, where the edge beam has lost support as the outer clay shrank. They feel the same underfoot and call for opposite repair plans, so guessing between them is the costliest mistake an inspection can make.

What the elevation survey and report actually capture

Your written report is meant to be read, questioned, and compared against any other bid, not to manufacture urgency. It documents:

• A full ±0.01-in. elevation contour of the slab, with the high and low points marked, so the deflected shape is on paper instead of in someone's head.
• Whether the pattern reads as center-dome heave or perimeter sag, the single distinction that decides the entire repair approach.
• Soil context for your lot: Houston Black clay dominates the Converse area, typically carrying a plasticity index of roughly 40 to 60 and an active zone running about 8 to 15 feet deep depending on moisture history and nearby trees.
• Drainage and grading findings, including whether your lot meets the 6 inches of fall over the first 10 feet that keeps storm water off the beam.
• Which cracks are active versus dormant, a re-opened, previously patched crack tells a different story than a stable hairline, and the report flags the difference.
• If movement warrants repair, a pier plan with locations, target depth, lift sequence, and the expected outcome stated in measurable terms.

Why depth is the number that matters here

Houston Black clay does not sit still. It swells through wet springs, then shrinks away from footings in the summer drought, and a slab poured in the 1970s and '80s building booms sits right inside that moving layer. Any support that terminates within the active zone, as older concrete pressed piers often do, moves with the soil it is buried in.

That is why the report's pier recommendations specify galvanized steel piers driven hydraulically past the active clay and into the competent strata beneath it. Reaching stable ground is what holds; depth, not the volume of concrete poured, is what keeps a piered section out of the seasonal cycle. The completed work carries a lifetime warranty that transfers to the next owner, so the inspection and the plan it produces become a documented asset for the property.

Drainage earns close attention because so much of Converse is flat. Where landscaping or added flatwork has reversed the original slope, water ponds against the beam and keeps the clay swelling and shrinking unevenly. The report pairs any structural findings with specific drainage and erosion-control recommendations, suggested only where they protect the foundation, never as filler. Typical Converse projects, when repair is needed, run $4,500 to $14,000, and financing is available.

Converse foundation inspection questions