Termites cause an estimated $5 billion in property damage across the United States every year – and the majority of that damage happens before homeowners know anything is wrong. Swift Pest Solutions fields calls from Tucson homeowners who’ve discovered significant structural damage that had been quietly building for months, sometimes years. The frustrating truth is that most of those situations could have been caught earlier. The signs were there. They just didn’t know what to look for.
If you live in Southern Arizona, this matters more than most places. The combination of desert heat, occasional monsoon moisture, and Tucson’s prevalent subterranean termite populations creates conditions where infestations can establish and spread faster than the national average. Here’s what to watch for.
1. Mud Tubes Along Your Foundation
This is the most reliable visible sign of subterranean termites, which are the dominant species in the Tucson area. Subterranean termites build shelter tubes – pencil-thin channels made from soil, wood particles, and saliva – to travel between their underground colonies and the wood they’re feeding on. Without these tubes, they’d dry out and die above ground.
Look for them along the base of exterior walls, on the surface of your foundation, inside crawl spaces, and on piers or support posts. They’re often found on the shaded side of a structure and can travel vertically up concrete block or stucco to reach wood framing.
Finding a mud tube doesn’t always mean active termites are currently using it. A dried, hollow tube may indicate a past infestation that has since moved. But a professional inspection can determine whether it’s active, and that distinction matters for deciding on treatment.
2. Wood That Sounds Hollow When Tapped
Termites feed from the inside out. They consume the cellulose within wood while leaving the outer surface largely intact, which is exactly why infestations go undetected for so long. By the time wood looks visibly damaged, the structural integrity is often already compromised.
A simple tap test can reveal what your eyes can’t. Take a screwdriver handle or your knuckle and tap along baseboards, door frames, window sills, and exposed structural beams. Solid wood produces a dense, flat sound. Wood that’s been hollowed by termites sounds distinctly papery or hollow – almost like tapping on a cardboard tube.
Pay particular attention to areas near moisture sources: under sinks, around water heaters, near bathroom walls, and in any area where a past roof leak occurred. Termites are drawn to wood that’s already been softened by moisture. If the tap test reveals hollow spots in multiple locations, don’t wait on a professional opinion.
3. Discarded Wings Near Windows and Doors
Termite swarmers are reproductive termites that leave an established colony to start new ones. They’re winged, and they’re attracted to light, which is why you’ll often find them near windows, sliding glass doors, and light fixtures. The swarm itself typically lasts only a matter of minutes to hours.
What you’re more likely to find afterward is the evidence: small piles of discarded wings. Swarmers shed their wings almost immediately after landing, so the wings accumulate near entry points. They’re small, uniform in size, and often mistaken for fish scales or seed husks.
Swarming in Tucson typically occurs in spring and again after monsoon rains begin in late June or early July. If you find a pile of discarded wings anywhere inside your home or along the exterior perimeter after a warm evening, treat it as a serious indicator worth investigating immediately. A swarm inside the house means there’s an established colony somewhere nearby, often within or beneath the structure itself.
4. Doors and Windows That Suddenly Stick
This one gets dismissed constantly because it seems unrelated to insects. A door that suddenly becomes difficult to open or close, or a window frame that feels warped, is easy to chalk up to humidity changes or the house settling. Sometimes that’s all it is. But when termites damage the wood framing around door and window openings, the structural distortion can cause those same symptoms.
The key differentiator is pattern and location. If you’re noticing sticking in multiple doors or windows that were previously fine, and you’re seeing other signs on this list, the combination is worth taking seriously. Termite damage in framing tends to be asymmetrical and progressive – it gets worse over time, not better.
5. Frass: Termite Droppings Near Wood Surfaces
Drywood termites, which are less common in Tucson than subterranean species but not rare, leave behind frass – their fecal pellets. Unlike subterranean termites that use their waste to construct mud tubes, drywood termites push frass out of small kick-out holes in the wood they’re infesting.
Frass looks like tiny, uniform pellets, roughly the size and shape of a grain of sand but hexagonal in cross-section. It’s most often found in small piles on windowsills, on floors beneath infested wood, or in corners near wood framing. Color varies depending on the wood being consumed.
Finding frass usually indicates an active, ongoing infestation rather than a historic one. It’s one of the more time-sensitive signs on this list.
What to Do If You Notice Any of These Signs
The single most important thing is not to wait. Termite damage is cumulative. Every week of delay is additional feeding time, and repair costs scale faster than most homeowners expect. A localized problem found early might require targeted treatment. The same infestation found two years later can require extensive structural repairs alongside treatment.
Don’t attempt to treat termites yourself. Over-the-counter products rarely reach the colony, and treating the surface while the source remains active gives the illusion of progress without solving the problem. Professional termite treatment – whether liquid barrier applications, bait stations, or localized wood treatment for drywood species – requires proper product selection, dosing, and application to be effective.
How Swift Pest Approaches Termite Inspections
Swift Pest Solutions conducts thorough property inspections that go beyond the areas you can easily see. That means checking crawl spaces, attic framing, sub-floor areas, exterior wood contact points, and the perimeter foundation for signs of mud tubes, frass, damage, or conditions that make termite activity likely.
The inspection informs the treatment recommendation. Not every situation calls for the same approach, and a legitimate pest control company will tell you that. If there’s no active infestation but conditions are conducive to one, preventive treatment is often worth discussing. If there’s an active colony, the treatment plan will depend on the species, the extent of the infestation, and the areas of the structure affected.
Tucson homeowners who catch termite problems early consistently spend less money and deal with far less disruption than those who discover the damage late. If you’ve noticed any of the signs above, or if it’s simply been a while since your home was inspected, contact Swift Pest Solutions to schedule an evaluation.