Houston may be the most termite-friendly large city in Texas. Heat, high humidity, regular heavy rain and a long warm season keep colonies foraging for most of the year, and the Gulf Coast is one of the few parts of the country where the aggressive Formosan termite is established alongside the native subterranean species.
Which termites live in the Houston area
Native eastern subterranean termites account for most of the damage in older neighborhoods. They nest in damp soil and build mud tubes up foundation walls. Formosan subterranean termites, an introduced species, form far larger colonies and can eat through wood faster; they also nest above ground in wall voids where there is a moisture source such as a roof leak or plumbing drip. Drywood termites occur at lower levels and are more of a coastal and Galveston-side issue. A trained inspector can distinguish them by the soldiers and the swarm timing.
Houston-specific risks
- Slab-on-grade homes dominate. Termites enter through expansion joints, plumbing penetrations and cracks in the slab, and are hidden behind brick veneer and stucco.
- Bayou-adjacent neighborhoods, including parts of the Heights, Memorial and Meyerland, have moist soils and heavy tree cover.
- Flooded and repaired homes can hide moisture in framing and drywall, which draws termites.
- Older bungalows in Montrose, Houston Heights and Third Ward often have pier-and-beam foundations that offer crawl-space access for termites.
Warning signs
Winged swarmers appear on warm days, often after spring rain, and Formosan swarms occur on humid evenings in late spring and gather around lights. Other clues include mud tubes along slab edges and pier posts, wood that sounds hollow, doors that start sticking, and small piles of shed wings near windows. Bubbling paint or tiny pinholes in drywall can also indicate hidden activity.
How treatment is typically done
A licensed provider inspects the slab edge, attic, crawl space, garage, fences, and areas around plumbing and air conditioning lines. Texas regulates structural pest control, so providers carry state licensure and provide written findings and treatment details. Treatment may include a liquid soil barrier around the foundation, bait stations, or spot treatment of wood. Formosan activity often calls for a more extensive approach, including aerial colony checks and moisture correction. Houston providers often recommend ongoing monitoring because pressure here rarely drops to zero.
Prevention for Gulf Coast homes
- Keep soil and mulch below the slab line and away from siding.
- Fix leaking pipes, AC condensate drains and roof flashing without delay.
- Run gutters and downspouts well away from the foundation.
- Remove stumps, old fence posts and buried wood scraps near the house.
- After any flood or water intrusion, dry framing thoroughly and schedule an inspection.
Who to call
PestMinistry is a referral service, not a termite company. Call (844) 725-1661 and we will connect you with an independent licensed provider in our network who handles termite inspections and treatment in Houston. That provider performs the work and walks you through the findings.
Termite questions in Houston
What makes Formosan termites different?
They form very large colonies, damage structures faster, and can live above ground. Both the species and the moisture source need attention.
Does my brick house need protection?
Yes. Brick veneer does not stop termites from entering through slab gaps and wood framing behind the brick.
When is swarm season in Houston?
Subterranean swarms often follow spring rains, and Formosan swarms come on warm, humid evenings in late spring and summer.
Can flooding make termite problems worse?
It can, when wet wood is left in place. Thorough drying and inspection after repairs are sensible.