Key Takeaways
- Fresh mud tubes indicate activity — Moist, soft mud tubes that get repaired after breaking signal an active subterranean termite colony. Dry and crumbly? Old damage.
- The mud tube test works — Break off a small section and check back in 2-3 days. If it’s rebuilt, they’re still using that pathway.
- Clicking sounds reveal colonies — Soldier termites bang their heads against wood when disturbed. You might hear faint clicking inside walls at night.
- Swarmers indoors = established colony — Finding winged termites inside your home means a mature colony’s already there. That’s a red flag.
- Fresh frass confirms drywood activity — Tiny pellet-shaped droppings near wooden items? They’re actively feeding. Time to act.
- Old damage looks different — Brittle tubes that stay broken and no live insects suggest a past infestation. Still worth inspecting.
Cockroach or spider infestation? You’ll know pretty fast. But termites? They’re sneaky. Knowing whether your home’s housing active termites is harder—especially in Houston, where the warm, humid climate keeps them feeding year-round. If you suspect an issue, Houston termite control professionals can assess your property quickly.
For many Houston homeowners, it takes finding damage during construction or seeing a swarm to raise the issue. For a full rundown of warning signs, check out the guide to signs of termites in Houston homes. These insects are mostly silent, hard to spot, and found in every U.S. state except Alaska. That’s why they cause more than $5 billion in property damage across the United States each year, according to the National Pest Management Association. Billion with a B.
How To Tell if Termites Are Active
So how do you tell if what you’re seeing is old damage or an active problem? That’s the million-dollar question. A licensed Houston pest exterminator can assess your structure and figure out whether:
- Active termites are currently feeding on your home
- Previous termite activity isn’t a threat anymore
- Another wood-destroying insect, like carpenter ants, is the culprit
Once you know what you’re dealing with, you and your pest control pro can put together a plan. In Greater Houston, Eastern subterranean termites are the most common species, per Texas A&M AgriLife Extension. Swarm season typically runs February through May. That’s when you’ll see the most obvious signs.
Signs That Termites Are Currently Active
Several indicators help you tell the difference between an active infestation and old damage that’s no longer a threat.
Mud Tubes That Are Moist or Get Repaired
Subterranean termites build pencil-width mud tubes along foundation walls—ugly brown lines running from soil to wood. Active tubes feel moist and soft when pressed. Dry and crumbly? That’s old damage.
Here’s the definitive test: break off a one-inch section and check back in 2-3 days. If it’s repaired, the colony’s still using that pathway. Not a good sign.
Live Termites When Wood Is Opened
If you break open damaged wood or a mud tube and spot small, cream-colored insects (about 1/8 inch long), you’re looking at active worker termites. Their presence confirms ongoing infestation. No question about it.
Clicking or Tapping Sounds
Soldier termites bang their heads against tunnel walls when the colony’s disturbed. Weird, right? Houston homeowners sometimes hear faint clicking inside walls during quiet evening hours. Press your ear against suspected areas—if you hear munching or tapping, active termites may be feeding.
Fresh Frass (Termite Droppings)
Drywood termites leave behind tiny, six-sided pellets—basically termite droppings. Fresh frass piles near furniture, windowsills, or baseboards? That means they’re actively chewing. Not great. The pellets typically match the color of the wood being consumed.
Swarmers Emerging Indoors
Finding winged termites—or their discarded wings—inside your home? That’s a serious warning sign. Don’t brush it off. Swarmers are reproductive termites that leave mature colonies to start new ones. If they’re showing up indoors during Houston’s swarm season (February through May), a mature colony’s already established in or near your home.
You might not see flying insects, but check around closed doors and windows in spring. Reproductive termites shed their wings after emerging. Those little piles near entrance points are calling cards.
New Damage Appearing
Termite damage vs. wood rot can be hard to distinguish. If floors are blistering like water damage—but there’s no water damage—that signals active feeding. Hollow-sounding wood, stuck doors and windows, bubbling paint that wasn’t there before? All indicators of ongoing activity.
Signs That Termite Damage Is Old
Not all termite evidence means you’ve got an active infestation. Here’s how to spot inactive damage:
- Dry, brittle mud tubes that crumble easily and stay broken
- No live insects when damaged wood is opened
- Hollow wood with no fresh changes over time
- Old frass piles that don’t accumulate new pellets
- Discarded wings from past swarm seasons with no new swarmers
Even if damage is inactive, the structural risks may remain. A solid inspection can confirm whether termites are gone and assess what needs fixing.
What Color Are Termites?
It can be hard to tell carpenter ants vs. termites apart at first glance. Termites vary in color depending on their role:
- Workers — Cream or white, about 1/8 inch, soft-bodied
- Soldiers — Larger heads with mandibles, cream to light brown
- Swarmers — Dark brown or black, winged, 1/4 to 1/2 inch
Key differences from ants: termites have straight antennae (ants have bent ones), equal-length wings (ants’ front wings are longer), and thick waists (ants have pinched waists). Easy tells once you know what to look for.
Where Are Termites Found in Houston?
Houston’s subtropical climate supports multiple termite species year-round. That’s the bad news. Here’s what you’re up against:
Subterranean Termites — The most common in Greater Houston. These termites live in underground colonies and build mud tubes to travel between soil and wood. Subterranean termites in Texas enter homes through foundation cracks and wherever wood contacts soil. They can’t build nests inside wood—they need soil contact for moisture.
Drywood Termites — These nest directly inside dry wood, including walls, roofs, and furniture. They don’t need soil contact, making them harder to detect until frass appears. Sneaky.
Dampwood Termites — Found in decaying wood with high moisture content. More common in rotting trees than Houston homes, but they can infest structures with moisture problems.
Strategies for Termite Prevention
Prevention costs a fraction of what treatment runs. Seriously—a few hundred dollars in annual inspections beats a $5,000 repair bill. Houston homeowners should:
- Schedule annual termite inspections — Professional inspections catch activity early, potentially saving thousands in repairs
- Eliminate moisture sources — Fix leaking pipes, clean gutters, and make sure downspouts direct water away from foundations
- Remove wood-to-soil contact — Keep firewood away from exterior walls and make sure siding doesn’t touch soil
- Maintain foundation clearance — Grade soil away from your foundation and keep mulch at least 6 inches from siding
- Check for mud tubes regularly — Inspect foundation walls, especially shaded areas and near plumbing penetrations
For help identifying potential entry points, see how to tell if you have termites in your walls.
What To Do If You Find Active Termites
Think you’ve got active termites? Here’s what to do:
- Don’t panic. Termites work slowly. You’ve got time to respond—just don’t wait months.
- Document what you find — Take photos of mud tubes, damaged wood, or swarmers
- Don’t spray store-bought pesticides — This scatters the colony without killing it and makes professional treatment harder
- Contact a licensed professional — They can confirm activity, assess damage, and recommend treatment
Treatments to eliminate active termites include liquid barriers applied to soil, bait systems, and building materials designed to repel these pests. These treatments are regulated by the federal government. DIY won’t cut it.
Frequently Asked Questions About Active Termites
Identifying Active Infestations
How do I know if termite damage is old or new? Fresh damage shows moist mud tubes, live insects when wood’s broken open, and tubes that get repaired within days of being broken. Old damage features dry, crumbling tubes, no live termites, and hollow wood without ongoing changes. The mud tube test—breaking a section and checking if it’s rebuilt—is the most reliable method.
Do termites make clicking noises? Yes. Soldier termites bang their heads against tunnel walls when the colony’s disturbed, creating faint clicking or tapping sounds. Homeowners sometimes hear this inside walls during quiet evening hours. Press your ear against suspected wood—if you hear munching or tapping, that’s a strong indicator of active feeding.
Can I confirm active termites without opening walls? Usually not until swarm season. Worker termites stay hidden inside wood and soil. The most common ways to confirm activity without opening walls include checking for fresh mud tubes, listening for sounds, looking for new frass piles, or spotting swarmers near windows and doors during spring.
What does an active mud tube look like vs. an old one? Active mud tubes appear moist, darker in color, and feel soft when pressed. Old tubes are dry, light-colored, brittle, and crumble easily. The definitive test: break off a one-inch section. If termites repair it within a few days, the colony’s actively using that tunnel. If it stays broken, they’ve moved on.
Can termites come back after treatment? Yes. Termites can reinfest if conditions remain favorable—ongoing moisture issues, untreated wood-to-soil contact, or gaps in chemical barriers. Most professional treatments include warranties covering retreatment if termites return. Annual inspections help catch any reinfestation early.
Taking Action
What attracts termites to my home in the first place? Moisture’s the primary attractant. Leaky pipes, poor drainage, clogged gutters, and wood-to-soil contact create ideal conditions. Firewood stacked against the house, mulch piled near foundations, and untreated crawl spaces also invite termite activity.
Should I spray pesticides if I find termites? No. Don’t disturb the colony with store-bought sprays. This scatters termites without eliminating them and can complicate professional treatment. Instead, document what you find with photos, avoid disturbing the area further, and contact a licensed pest control company for inspection.
How often do I really need a termite inspection? Annual professional inspections are the industry standard, particularly in high-risk areas like Houston. Many pest control companies offer inspection as part of ongoing protection plans. The cost of annual inspection’s minimal compared to repair costs from undetected damage.
Will my homeowners insurance pay for termite damage? Most standard homeowners policies exclude termite damage because insurers consider it preventable through regular maintenance. Some exceptions exist (like termites causing an electrical fire), but don’t count on coverage. Prevention and early detection are your best financial protection.
When are termites most active in Houston? Termites remain active year-round in Houston’s mild climate. However, swarm season (February through May) is when you’re most likely to see visible evidence. Swarmers emerging indoors during these months indicate a mature colony’s already established in or near your home.
ABC Can Help With All of Your Pest Problems
Finding active termites on your property can be alarming. These pests are destructive, and their colonies can contain thousands—even millions—of individuals. If you think you’ve got active termites on your Houston property, contact ABC Home & Commercial Services. The company’s licensed professionals will locate the termite colony, implement effective treatment, and set up ongoing monitoring to prevent future infestations.
Schedule professional termite treatment today to protect your home.