Slab-on-grade foundations dominate housing stock in 78254 neighborhoods such as Braun Station and the surrounding Bexar County developments built from the 1980s onward. Subterranean termites enter through expansion joints, plumbing penetrations, and hairline cracks created when clay soils heave during wet winters and shrink in dry summers. Standard liquid barriers applied only at the perimeter often miss colonies already established under the slab, allowing hidden damage to spread along sill plates and into floor joists.
Drilling through the slab at 12- to 18-inch intervals lets technicians reach the soil beneath with non-repellent termiticides that transfer through the colony. In 78254 properties near the Leon Creek floodplain, elevated moisture from seasonal rains accelerates termite activity, so treatments frequently include installing moisture barriers and correcting drainage around the foundation edge. Technicians must also map plumbing lines beforehand to avoid hitting supply or drain pipes during drilling.
Homeowners sometimes confuse frass or mud tubes along baseboards with simple moisture issues, delaying treatment until structural weakening appears. Because many 78254 slabs sit directly on compacted fill rather than native soil, termites can travel laterally for long distances before surfacing, requiring a full under-slab grid rather than spot treatments. Follow-up inspections every 90 days confirm colony elimination and catch any new activity entering through unsealed utility sleeves.
Technician insight
In San Antonio 78254 the thing that catches most people out with termites under slab is how quickly clay soil movement opens new cracks around plumbing sleeves after a wet winter. Homeowners often treat only the perimeter and miss the colony living directly beneath the living room floor.
Braun Station Slab Job
Termite tubes appeared along baseboards in a 1990s ranch on the west side of 78254 after heavy spring rains. Inspection showed active foraging under the slab near the master bath plumbing. Drilling on a 16-inch grid and soil treatment eliminated the colony; follow-up checks at 90 days found no new activity.
Termites Under Slab Services We Offer
✓Slab Drilling and Soil Treatment
Precision drilling through concrete followed by targeted termiticide application directly into the soil beneath the slab to reach hidden colonies.
✓Under-Slab Bait Station Installation
Placement of monitoring and bait stations through or around slab edges to intercept foraging termites before they reach living areas.
✓Plumbing Penetration Sealing
Inspection and sealing of pipe entries under the slab to block common entry points for subterranean termites in 78254 homes.
✓Moisture Barrier Installation
Addition of vapor barriers and drainage corrections beneath or around slabs to reduce the humidity that attracts termites in Bexar County clay soils.
✓Post-Construction Slab Perimeter Treatment
Trenching and rodding along the exterior foundation edge combined with interior slab treatments for complete coverage on existing homes.
Termites Under Slab Cost in San Antonio 78254, TX
| Service | Typical Range | What Affects It |
|---|---|---|
| Full Slab Treatment (1,500–2,200 sq ft) | $850–$1,650 | Price rises with number of plumbing penetrations and extent of moisture issues. |
| Targeted Drilling and Injection | $450–$750 | Limited to active zones identified during inspection. |
| Bait Station System Add-On | $300–$550 | Installed at slab edge or through drilled holes for ongoing monitoring. |
| Moisture Barrier and Drainage Fix | $400–$900 | Includes French drain correction or vapor barrier placement near slab. |
Ranges are typical for San Antonio 78254, TX and confirmed with an exact written quote before any work starts.
How it works
- 1
Detailed Slab Inspection
Technician maps plumbing, checks for cracks and mud tubes, and uses moisture meters to locate active zones under the concrete.
- 2
Strategic Drilling Pattern
Holes are drilled on a grid that follows termite trails while avoiding utility lines common in 78254 slab construction.
- 3
Targeted Soil Application
Non-repellent termiticide is injected under pressure to create a treated zone that termites carry back to the colony.
- 4
Monitoring and Follow-Up
Stations are placed and quarterly checks confirm activity has stopped before holes are sealed and the surface restored.
Pricing
Most under-slab jobs in 78254 fall between several hundred and low thousands depending on square footage and drilling access.