You just found out a neighbor has termites. The honest answer to the obvious question is yes, it is worth paying attention. Not panicking, but paying attention. Here is what that means for a house in the Pittsburgh area, and when it is worth booking a termite inspection of your own.
Why a neighbor’s problem is partly your problem
Termites do not respect property lines. The eastern subterranean termite, the species established throughout Pennsylvania, nests underground and forages well over 100 feet from the nest looking for wood. If a neighbor has an active infestation, there is a reasonable chance activity already extends into the soil around nearby properties.
There is a second route in spring. Mature colonies release winged swarmers, usually March through June here, and those swarmers leave to start colonies nearby.
Subterranean colonies live in the soil and forage outward, so property lines mean nothing to them.
How they move between properties
Subterranean termites travel through soil, working from one food source to the next. A few shared conditions make that easier:
- Tree roots and old stumps. Termites feed on dead wood in the ground long before they find a foundation
- Mulch beds and landscaping. Wood mulch holds moisture and makes an easy path
- Wood debris. Old fence posts, firewood piles and construction scrap near property lines
- Drainage. Poor grading that affects several houses at once creates the damp conditions colonies need
Pittsburgh’s clay soil holds water well, which suits them. That is part of why this region supports termite colonies as readily as it does.
What to check now
Signs of activity:
- Mud tubes on foundation or basement walls, about the width of a pencil
- Discarded wings near windows, doors or in window wells after a spring swarm
- Wood that sounds hollow when tapped
- Soft spots in trim, especially near the foundation
- Buckling paint or small holes in drywall
Conditions that invite them:
- Wood touching soil anywhere on the property
- Clogged gutters pooling water near the foundation
- Mulch or soil piled against siding
- Crawl space damp or standing water
- Leaking exterior faucets or condensation lines near the foundation
Mud tubes on a foundation wall are the clearest sign of subterranean activity.
How worried should you actually be?
It depends almost entirely on distance and conditions. A colony under a house three streets over is not a meaningful threat to yours. A colony in the house next door, on a lot where both properties have mulch against the siding and downspouts dumping at the foundation, is a different matter.
The useful way to think about it is that the neighbor’s infestation is information, not a verdict. It tells you the soil in the immediate area supports a colony, that there is a mature nest nearby producing swarmers each spring, and that whatever conditions allowed it are probably present on your lot too, since neighboring houses tend to share age, construction and drainage.
None of that means your house has termites. It means the question is worth answering properly rather than waiting to find out.
Will their treatment push termites toward my house?
This worry comes up constantly and it misreads how modern treatment works. Bait systems use slow acting material that workers carry back to the colony, which eliminates the nest rather than relocating it. Modern non repellent liquid soil treatments work in the treated zone without herding colonies next door.
The real point is different. If a neighbor has termites, the soil in the immediate area clearly supports them, and the house may be at some risk regardless of what happens on their property.
Row houses, duplexes and shared walls
A good deal of Pittsburgh housing is attached or very closely spaced. In a row of houses or a duplex, the question stops being about soil alone, because framing, joists and sill plates can run between units or sit inches apart.
That does not mean an infestation next door is automatically inside your walls. It does mean an inspection should look at the shared wall, the common foundation and any framing that crosses the line, instead of treating the property as if it stood alone in a field.
It also means coordination helps. Where colonies are foraging under two attached houses, treating one side and not the other leaves half the food source untouched.
In attached houses the framing itself can run between units.
What waiting costs
Termites work slowly and without stopping, which sounds manageable until a few things are taken together:
- Termite damage is not covered by homeowners insurance
- Structural repairs mean a contractor, not just a treatment
- Known termite damage has to be disclosed and can complicate a sale
The longer it goes unfound, the larger the job becomes. How fast can termites destroy a house lays out that timeline in detail.
What not to do
Two reactions are common and neither helps.
The first is tearing into the yard. Pulling up mulch, digging along the foundation or stripping landscaping does not remove a colony living in soil, and disturbing suspected tubes before an inspection destroys the evidence that tells an inspector whether activity is current.
The second is reaching for a hardware store spray. Over the counter products kill the termites they touch, which is a tiny fraction of a colony that may number in the hundreds of thousands and live entirely out of reach. Worse, repellent products can push foraging workers to a different part of the structure, so activity appears to stop while the colony keeps feeding somewhere less convenient to find. The truth about DIY termite treatments covers why that happens.
If you find a mud tube, leave it alone and photograph it. An intact tube is useful information.
Sensible steps
- Have the house inspected. It is the only way to know, and the early years of an infestation leave no visible sign
- Fix moisture. Drainage, gutters, downspout extensions, crawl space ventilation
- Remove what attracts them. Clear wood debris from the foundation, keep mulch back from siding, break any wood to soil contact
- Consider preventive treatment. In a street with known activity, a liquid treatment or bait stations are a reasonable precaution rather than an upsell
Our termite inspection and treatment service covers the inspection and the options that follow, and what happens during a termite inspection explains the visit itself.
Stewart Termite & Pest Control has worked on Pittsburgh termites since 1987. If a neighbor has an active problem and you want your own property checked, call 412-822-7610 or request an estimate online.
Frequently Asked Questions
If my neighbor has termites, will I get them?
Not necessarily, but the risk is real. Eastern subterranean termites forage well over 100 feet from the nest, and spring swarmers start new colonies nearby, so activity next door often means activity in the surrounding soil.
How far can termites travel from their nest?
Workers commonly forage more than 100 feet through soil from an established colony, and studies have tracked them considerably farther.
Will treating my neighbor’s house drive termites to mine?
No. Bait systems eliminate the colony through workers carrying material back to the nest, and modern non repellent liquid treatments act within the treated zone. Neither pushes a colony next door.
When do termites swarm in Pittsburgh?
Usually March through June, on warm humid days and often right after rain.
Does homeowners insurance cover termite damage?
Generally no. Termite damage is treated as preventable maintenance rather than sudden loss, which is why inspection is the cheaper path.
Should I treat preventively if my neighbor has termites?
It is worth discussing after an inspection. On a street with known activity, a liquid treatment or bait stations are a reasonable precaution.