Subterranean Termite Basics

If you own a home in Tennessee, Georgia, or Alabama, subterranean termites are worth understanding. They are the dominant termite species across this part of the country and account for the large majority of termite damage to residential structures. Knowing how they live, why they build mud tubes, and what makes them persistent helps you recognize the signs and make informed decisions about your home.

What subterranean termites are and how they differ from other species

Subterranean termites — Reticulitermes flavipes is the most common species in our area — live in the soil and depend on soil contact for survival. They require consistent moisture and cannot tolerate dry conditions. If a subterranean termite is separated from its soil colony for more than a few hours, it will typically die. This distinguishes them from drywood termites, which live entirely inside wood with no soil contact, and dampwood termites, which prefer wet wood but still require moisture. The warm, humid climate across Tennessee, Georgia, and Alabama provides ideal year-round conditions for subterranean termite activity.

How a subterranean termite colony is organized

A subterranean termite colony is a structured society. A single colony can range from tens of thousands to well over a million individuals. Within the colony, sterile workers do all the feeding — they consume wood and cellulose continuously. Soldiers defend the colony from threats, primarily ants. A king and queen reproduce and gradually expand the population over time. Smaller colonies may take several years to produce visible signs, but as a colony grows, its feeding capacity increases proportionally. This is why early detection through regular inspections is so valuable.

Why mud tubes are the most important sign to know

Subterranean termites face a basic challenge: they need to travel from soil up to wood in order to feed, but the open air is too dry for them to survive the journey. Their solution is to build mud tubes — thin, pencil-width tunnels made of soil and saliva that run from the ground up foundation walls, across basements, or along concrete piers. These tubes protect workers from dry air while they move between the colony and their food source.

A mud tube on a foundation wall is one of the clearest indicators of termite activity. You do not need to see visible wood damage to know termites are present — the tube itself is solid evidence that a colony is active nearby. The tubes may be empty at any given moment, since termites are not always actively traveling through them, but their presence confirms that a colony has established a route to the structure.

Where subterranean termites typically enter a home

Subterranean termites can reach a home from nearly any point where wood touches or is close to soil:

• Foundation edges and corners where siding or framing sits close to the ground
• Wooden porches, decks, or steps in direct soil contact
• Crawlspace walls and wooden framing throughout the crawlspace
• Mulch beds placed tight against the foundation
• Basement walls where wood framing or sills meet concrete
• Slab homes where termites can enter through cracks or expansion joints
• Any wooden structure in soil contact nearby — fence posts, garden beds, old stumps

The common thread is soil contact. Reducing or removing points where wood meets soil is one of the most practical steps a homeowner can take.

Year-round activity in our climate

In colder climates, deeply frozen soil can slow termite activity significantly during winter. In Tennessee, Georgia, and Alabama, soil rarely freezes deeply enough to disrupt colonies. Subterranean termites remain active and feeding throughout the year — they simply move deeper into the soil during cooler months. Spring is when swarms of winged reproductives emerge, which is the most visible sign of their presence, but the colony is working in every season. Fall and winter inspections often reveal activity that went unnoticed during warmer months.

When to schedule a professional termite inspection

If you have found mud tubes on a foundation wall, seen winged swarmers in or near your home, noticed wood that sounds hollow when tapped, or simply want a professional assessment, an inspection is a practical next step. Specter’s experienced technicians have the tools and training to check crawlspaces, foundations, and areas that are difficult to access on your own. We will walk you through what we find and explain what makes sense for your home. Give us a call whenever you are ready — we are always glad to help.