Termite Prevention in San Antonio, Texas
Preventing termites in San Antonio comes down to two things: keep the soil next to your house dry, and keep wood from touching it. Most termite trouble here comes from subterranean termites that travel up from the soil, so leaks, high soil lines, mulch against the slab and wood resting on dirt are the conditions that invite them in. Regular inspections and, where it makes sense, a preventive treatment cover what homeowner habits cannot.
To have your home checked for conducive conditions, call or text (210) 281-1064 or book a visit online.
What actually keeps termites away from a house? #
No single product or habit does it alone. TDA's termite guidance lists the conducive conditions inspectors write up most often: wood touching soil, firewood stacked against the foundation, wood debris in crawl spaces, wood mulch within about 3 feet of the house, poor grading, weak ventilation and excess moisture. Every item you clear off that list removes a reason for termites to choose your home. The sections below turn it into a walk-around checklist.
Start with water: leaks, drips and drainage #
Subterranean termites dry out quickly, so damp soil and wet wood are their lifeline. AgriLife's subterranean termite guide (E-368) puts moisture control near the top of its prevention advice:
- Fix plumbing leaks, including slow drips under sinks and at outdoor faucets.
- Repair roof leaks and keep gutters flowing, with downspouts emptying away from the slab.
- Route AC condensate lines so they do not drip against the foundation.
- Slope the soil so rain runs away from the house rather than pooling beside it.
- Adjust sprinklers so they water the yard, not the foundation.
Keep soil and wood apart #
The second rule is distance. AgriLife recommends keeping the soil 6 to 8 inches below the top of the foundation, which leaves a strip of slab exposed so any mud tubes are easy to see. Then look for every place wood reaches the ground:
- Fence posts or gates fastened directly to the house
- Wooden steps, decks and trellises resting on dirt
- Leftover form boards and grade stakes from construction
- Old tree stumps and buried wood scraps near the slab
Where wood has to touch the soil, AgriLife suggests pressure-treated lumber, and removing scraps and stumps entirely where you can.
Yard habits that invite termites #
A few common yard choices give termites food and cover right against the house:
- Wood mulch: pull it back so it sits about 3 feet or more from the foundation, the distance TDA uses for conducive conditions.
- Firewood: stack it out in the yard, not against the wall. The EPA's termite guidance also warns against piling wood debris beside the home.
- Dense shrubs: trim them back from the foundation so air moves and you can see the slab.
- Railroad ties and shoring timbers: AgriLife's Formosan bulletin warns that recycled ties are the main way Formosan termites reach new areas, and creosote does not stop them. Choose other materials for borders and beds.
Crawl spaces and utility openings #
Pier-and-beam homes need a dry crawl space. AgriLife advises good ventilation and plastic sheeting over most of the soil to cut humidity, plus clearing out any scrap wood stored underneath. On every house, seal openings where pipes and wiring pass through the foundation, since termites follow those gaps.
Keeping drywood termites out of attics and furniture #
Drywood termites fly in rather than coming up from soil. AgriLife's drywood bulletin suggests:
- Screening attic and foundation vents with 20-mesh wire
- Caulking joints and cracks in exposed wood
- Checking used furniture for small piles of pellets before bringing it home
Preventive treatment and routine inspections #
Good habits lower the odds but do not remove them. AgriLife's guide on choosing a termite service puts the risk for unprotected homes at more than 70% within 10 to 20 years of construction. Registered termiticides lasted four to ten years in Texas A&M testing, so a preventive treatment can make sense, especially for homes that have never been treated or whose last treatment is years old.
Inspections matter too, because active infestations are hard to see until damage is done. A trained inspector can catch tubes and early damage you might walk past. If you want to learn the warning signs yourself, see signs of termites.
How Pest Trappers helps with termite prevention #
A prevention visit from Pest Trappers starts with the same inspection as any termite call: foundation, soil line, moisture sources, wood contact, attic and crawl space. The technician points out the conducive conditions found, explains which you can fix yourself, and walks through the preventive treatment options that suit the house. Products are applied only as the label directs, and the price comes after the inspection. Termite work is carried out by Pest Trappers LLC (TPCL #0887549) under TDA's termite category.
We serve San Antonio, Leon Springs and The Dominion and Boerne. For treatment details, see termite control in San Antonio, and for the insects themselves, the termite fact sheet.