Signs of Termites in Your Houston Home
Termites destroy homes silently. Knowing the warning signs — mud tubes, hollow wood, discarded wings — is the first step to protecting your property before the damage becomes costly.
- Most Houston termite infestations go undetected for one or more seasons
- Early signs are often visible without specialist tools
- Termite damage is not covered by standard homeowner's insurance
- A licensed inspection confirms what you're seeing — book same-day
Why Houston Homeowners Miss Termite Activity Until It's Serious
Termites are called 'silent destroyers' for a reason — they work inside walls, beneath floors, and underground, out of sight and often out of mind. In Houston's warm, humid climate, both subterranean and Formosan termite colonies remain active year-round, meaning damage accumulates across multiple seasons before visible warning signs appear.
The most dangerous aspect of a termite infestation is the gap between when it starts and when you notice it. By the time paint blisters, wood sounds hollow, or swarmers appear in your living room, a colony has typically been consuming structural material for one or more seasons.
Understanding the specific warning signs of Houston's termite species — and knowing when to call a licensed inspector rather than waiting — is the most effective form of homeowner protection available.
Where to Look for Termite Signs in Your Houston Home
A practical room-by-room and zone-by-zone guide to checking your property.
- 1
Exterior Foundation and Perimeter
Walk the full perimeter of your home at ground level. Look for pencil-thin mud tubes running vertically from soil to wood or masonry — the primary indicator of subterranean termite activity.
- 2
Crawl Space and Subfloor
If your home has a crawl space, check wooden piers, beams, and floor joists with a flashlight. Look for mud tubes, areas of disintegrating wood, and moisture damage.
- 3
Interior Wood Surfaces
Tap baseboards, door frames, and windowsills. Hollow-sounding wood suggests termites have consumed the interior. Look for small holes in drywall and blistered or bubbled paint on wood surfaces.
- 4
Windowsills and Entry Points in Spring
In late winter through spring, Formosan and subterranean termites release swarmers. Piles of small discarded wings near windowsills, doors, and light fixtures are a high-urgency sign of an active nearby colony.
Termite Warning Signs in Detail
Mud Tubes — The Most Reliable Sign
Subterranean and Formosan termites cannot survive exposure to open air — they travel through mud tubes to move from soil to food sources. These tubes are typically 1/4 to 1/2 inch wide, tan or brown, and run along foundation walls, crawl space piers, utility conduits, and any surface connecting soil to wood.
Breaking open a mud tube reveals the workers inside if the colony is active. An empty tube is not necessarily inactive — termites often abandon and rebuild tubes as they explore new routes.
- Tubes on exterior foundation walls — most common entry point
- Tubes inside crawl spaces on piers and beams
- Tubes along plumbing penetrations through slabs
- Tubes on interior walls (sign of advanced infestation)
Swarmer Wings — A High-Urgency Warning
Termite swarmers are reproductive termites that emerge in spring to start new colonies. A swarm event lasts only 30–60 minutes, and you may only find evidence afterward — piles of small, equal-length wings near windowsills, doors, light fixtures, and vents.
Finding swarmer wings inside your home is a high-urgency sign that a mature colony is already established within or directly beneath your structure. Call for an inspection immediately — do not wait for the next swarmer season.
Hollow Wood and Blistered Paint
- Tap baseboards and door frames — hollow sound suggests internal consumption
- Blistered or bubbled paint on wood trim or drywall can indicate moisture from termites below
- Small exit holes in drywall — typically 1/8 inch diameter — left by drywood termites
- Sagging floors or doors that suddenly don't close properly — structural impact signs
Termite Signs vs. Other Causes — What Actually Indicates Termites
Not every crack, bubble, or hollow spot means termites — but knowing the difference determines urgency.
| Feature | Likely Termite Activity | Likely Other Cause |
|---|---|---|
| Mud tubes on foundation or in crawl space | ✓ | ✗ |
| Discarded equal-length wings near windows in spring | ✓ | ✗ |
| Hollow-sounding baseboards when tapped | High likelihood | Could be settling |
| Blistered paint on wood surfaces with no water source | ✓ | ✗ |
| Frass (small pellets) near wood — drywood species | ✓ | ✗ |
| Sagging floors near foundation walls | Possible — inspect immediately | Could be moisture damage |
| Flying ants vs. termite swarmers indoors | Termites: equal wing length | Ants: unequal wing length |
Signs of Termites — FAQs
I found mud tubes but they look dry and empty. Do I still have termites?
I saw termite swarmers in my house. How urgent is this?
Can I use a flashlight to inspect my crawl space myself?
What is the difference between termites and flying ants?
How quickly should I call after finding termite signs?
Species-Specific Signs to Watch for in Houston
Houston has three active termite species — each leaves different evidence.
Subterranean Termites
Mud tubes on foundation and crawl space. Swarmers in spring. Wood damage that follows the grain, leaving a hollow shell.
Formosan Termites
Larger mud tubes, carton material (tan foam-like substance) in walls. Swarmers in late spring/early summer evenings. Rapid, severe structural damage.
Drywood Termites
No mud tubes — drywood termites live entirely within the wood they consume. Frass (small fecal pellets) and small exit holes in wood surfaces are primary signs.
When to Suspect Formosan Specifically
Formosan infestations grow faster and cause more severe damage. If you find carton material or see swarmers in large numbers attracted to lights on warm evenings, call immediately.
Signs in New vs. Older Homes
Newer homes can develop infestations if pre-construction treatment was insufficient. Older homes are more likely to have accumulated, undetected damage in original wood framing.
Seasonal Activity Peaks
While Houston termites are year-round, swarmer season (February–May) and late summer moisture spikes drive peak activity. These are the best times for annual inspections.
What a Professional Inspection Provides That Self-Inspection Cannot
Knowing the signs gets you started — a licensed inspector tells you what they mean.
- Species identification — subterranean, Formosan, and drywood require different treatments
- Extent of infestation mapped across the full property — not just visible areas
- Official WDIR/NPMA-33 documentation for insurance, resale, or lender requirements
- Identification of conducive conditions that invite future infestations
- Written treatment plan with transparent pricing before any commitment
Next Steps After Spotting Termite Signs
Termite Inspection
Schedule a licensed WDO inspection — same-day available.
Termite Control
Complete termite control services across Greater Houston.
Termite Treatment
Treatment methods — liquid barriers, bait stations, spot treatments.
Annual Termite Inspection
Ongoing monitoring to prevent the next infestation.
How to Get Rid of Termites
DIY vs professional elimination — what actually works.
Found Signs of Termites? Get an Inspection Today
Same-day scheduling available across Greater Houston. Licensed WDO inspector. Honest findings, written report, transparent pricing if treatment is needed.