

Action House Leveling is based in Mercedes, just minutes from Combes. You get same-day inspections, a crew that knows the local soil profile, and reinforced concrete piers engineered for the ground under your slab.
Combes sits in the Harlingen clay belt on a flat Pleistocene terrace cut by old distributary channels of the Rio Grande.
The dominant soil is Harlingen clay — a fine smectitic Sodic Haplustert with PI typically 45–60 and a 'very high' shrink-swell rating.
Decades of agricultural irrigation from the Cameron County canals have elevated the baseline moisture content above natural levels, so the seasonal wet-dry cycle drives larger volume changes than the same soil would see in undisturbed conditions.
Sodium-affected horizons are common here, which lowers soil resistivity and corrodes unprotected steel piers within a decade.
Concrete piers driven 14–16 feet are the engineered answer for Combes slabs.
Older Combes homes along the Hwy 77 corridor see traffic vibration combine with seasonal swell to open existing cracks faster.
Slabs at the field margins absorb irrigation runoff from one side and dry naturally on the other — classic differential settlement setup.
Combes was built out with shallow 3.5" slabs and minimal rebar in the post-war boom; corner cracks are nearly universal at this age.
Older raised homes around downtown have sills and blocks that have rotted from chronic ground moisture.
Yes — we're 25 minutes west in Mercedes and work Combes weekly.
All of 78535 — downtown, the Hwy 77 corridor, and out FM 508.
Yes. Elevation readings, perimeter walk, written report — no cost.
Yes. We replace rotted sills, sister beams, and reset blocks on new concrete pads.