Subterranean Termites and Covington's Old Stone Foundations
Why this city, this problem
Northern Kentucky sits in one of the heavier subterranean termite pressure zones in the country. Eastern subterranean termites live in the soil and must keep contact with it, so they build pencil-width mud tubes up any surface that gets them to wood.
Covington hands them a ladder. The 19th-century rowhouses and Italianates in MainStrasse, Licking Riverside, Austinburg, and Wallace Woods sit on rubble stone and old brick foundations full of joints and voids. The sill plate resting on top of that foundation is often the first wood they reach, and a damp basement keeps everything comfortable.
The signs, in an old house
Mud tubes on the interior of a basement wall, on the foundation outside, or bridging from soil to joist are the clearest sign. In spring you may see a swarm of dark winged termites, or find discarded wings on a windowsill. Wood that sounds hollow, a sagging floor near an exterior wall, or a sill plate that gives under a screwdriver all point the same way.
Don't mistake carpenter ants for termites. Carpenter ants excavate damp wood and push out coarse frass; termites eat the wood and leave mud. Both love the same water-damaged sills, so it's worth having someone confirm which you have.
How it's treated, and what to fix
Subterranean termites are treated with a liquid termiticide soil barrier: the soil around the foundation is trenched and treated so termites hit a continuous treated zone. Where trenching is hard against an old stone wall or a shared party wall, in-ground bait stations fill the gap. Tenting is not the answer here; that's for drywood termites, which aren't Kentucky's problem.
The other half is moisture. A century of grade creeping up against the brick, downspouts dumping at the foundation, and a basement that never quite dries out is what made the wood attractive. Fix the water, then keep an inspection on the calendar. Catching termites early is far cheaper than replacing joists and sill plate.
Dealing with this in Covington?
Call and connect with an experienced local exterminator.