The termite warning signs Texas homeowners miss most are small and easy to mistake for something harmless: thin mud tubes on the slab, a few wings on a windowsill, paint that bubbles like water damage, or wood that sounds hollow when tapped. Because termites feed out of sight, those clues are often the only evidence you get before damage is underway.
Most termite trouble in Texas comes from native subterranean termites, which live in the soil and reach homes through mud tubes and foundation gaps. Pest Renewal walks through nine signs worth checking and what to do if you find one.
What Are the Most Common Termite Warning Signs in Texas?
The most common termite warning signs in Texas are mud tubes on the foundation, swarming insects or shed wings indoors, wood that sounds hollow or dull when tapped, bubbling paint, and tiny pellets near wooden trim. Any one of them justifies an inspection, because termite damage usually progresses behind walls and under floors where you can't see it.
1. Mud tubes on the slab or foundation
Subterranean termites dry out easily, so they travel through tubes built from soil and debris that run from the ground up to wood above. Check the slab edge, plumbing entries, crawlspace piers, and spots hidden behind shrubs. Texas A&M suggests breaking open a small section with a screwdriver to look for live termites; leave the rest intact for the technician.
2. Swarmers inside the house
Mature colonies release winged reproductives to start new colonies. Native subterranean termites swarm in spring, earlier in South Texas and later in the Panhandle. Swarmers emerging indoors almost always mean a colony is feeding in or beneath the structure.
3. Discarded wings
Swarmers drop their wings soon after flying, so a small drift of wings on a windowsill or near a door may be all that's left by the time you notice.
4. Hollow or dull-sounding wood
Subterranean termites eat the softer layers of wood along the grain, often leaving a thin outer surface intact. Tapping baseboards or door frames with a screwdriver handle can reveal spots that sound dull or feel soft.
5. Bubbling paint or warped surfaces
Termite activity under paint can make it blister or look water-stained even when there's no leak to explain it.
6. Doors and windows that suddenly stick
Sticking doors are common in North and Central Texas because clay soils shrink and swell with drought and rain, shifting foundations. That's usually the cause, but damage inside a frame can produce the same symptom, so rule out termites when it appears alongside other signs.
7. Frass from drywood termites
Drywood termites don't need soil contact; they live inside dry wood such as eaves, siding, and attic framing. They push out tiny, hard pellets that pile up under infested wood. Texas A&M reports drywood termites statewide but most heavily along the Gulf Coast, so inland homes see them less often.
8. Cracks and openings in the slab
Termites can build tubes over or through foundation cracks and follow plumbing penetrations and expansion joints up from the soil. Those routes sit under flooring and behind baseboards, which is why termites in a slab home can go unnoticed for a long time.
9. Moisture problems and wood touching soil
Leaking plumbing, roof leaks, AC condensate dripping by the foundation, and poorly maintained gutters keep soil and wood damp right where termites need it. Moisture isn't proof of termites, but it raises the risk. Texas A&M also flags any wood-to-soil contact as high risk and advises keeping the soil line several inches below the top of the slab, which flower beds and mulch heaped against brick can bury.
How Can You Tell Termite Swarmers From Flying Ants?
Look at the waist, antennae, and wings. Termite swarmers have a thick, straight waist, straight antennae, and four wings of equal length. Flying ants have a pinched waist, elbowed antennae, and front wings noticeably longer than the back pair. If loose wings on a sill are all the same size, they probably came from termites.
Save a sample
If you see swarmers, collect a few in a sealed bag or on a strip of clear tape, wings included. It takes the guesswork out of identification and gives your technician something concrete to examine.
Are Formosan Termites a Concern in North Texas?
Texas A&M lists Denton, Dallas, Tarrant, and Collin counties among the Texas counties where Formosan subterranean termites have been detected. Formosan swarmers emerge at night in late May and early June and gather around lights, so a cloud of insects at the porch light on a warm evening is worth photographing and reporting.
Denton-area homeowners should check light fixtures and windowsills in late spring. Local details are on our Denton pest control page.
What Should You Do If You Find Signs of Termites?
Don't spray the area or tear out damaged wood. Leave at least part of any mud tube in place, take photos, save a few swarmers if you can, and schedule a professional inspection. Disturbing the evidence makes activity harder to confirm.
- Skip store-bought sprays, which can scatter termites without reaching the colony.
- Fix obvious moisture sources, such as leaks and soggy soil along the slab.
- Have a licensed technician inspect so the species and extent of activity are confirmed.
Treatment ranges from liquid soil treatments to baiting systems, depending on the species and structure. See how termite control and inspections work. If your swarmers turn out to be winged ants instead, ant control is a different service with its own approach. Pest Renewal arranges inspections in Denton, Midland, and Waco-area homes alike.
Found mud tubes, wings, or damage you can't explain? Call Pest Renewal and describe what you're seeing. A specialist will set up an inspection with a licensed technician so you know for certain.
Frequently Asked Questions
When do termites swarm in Texas?
Native subterranean termites swarm in spring and early summer. Texas A&M notes swarms can begin in January or February in South Texas, while the Panhandle may wait until April or May. Formosan termites, found in some North Texas counties, swarm at night in late May and early June.
Can I check for termites myself?
You can do a basic walk-around: look for mud tubes along the foundation, check windowsills for wings, and tap exposed wood for hollow spots. A homeowner check can't see inside walls or under flooring, though, so a professional inspection is still needed to confirm activity.