How Subterranean termites Operate
Subterranean termites are the most common and destructive termite species in the United States. They live in colonies underground, typically 4–18 feet deep, and build intricate tunnel systems to reach food sources. They require moisture to survive, so they build mud tubes—pencil-sized tunnels made of soil and saliva—to travel from their colony to the wood above ground. These termites feed on cellulose, which is found in wood, paper, and other plant materials. They can enter a home through cracks in the foundation, expansion joints, or even through the gaps around plumbing and electrical conduits. Because they work slowly but continuously, a colony can cause significant damage over several years before it is detected. One of the most challenging aspects of subterranean termite control is the size of the colony. A mature colony can contain several hundred thousand to several million termites, and they can forage up to 300 feet from the nest. That's why a thorough inspection and a comprehensive treatment plan are essential.
Formosan termites: A Special Threat in the Gulf Coast
The Formosan subterranean termite is an invasive species that has become a major problem in the southeastern United States, particularly along the Gulf Coast from Texas to Florida, and as far north as North Carolina. It is often called the 'super termite' because of its aggressive behavior and large colony size. Formosan termites can build massive colonies that contain millions of individuals, and they are known to infest structures not just from the ground but also from above, such as through roof leaks or by building aerial nests. They can consume wood faster than native termites and are more likely to cause severe structural damage in a shorter time. Because of their high reproductive rate and ability to establish secondary colonies, Formosan termites require a more aggressive treatment approach. Liquid soil treatments with high concentration termiticides are often combined with bait stations to ensure complete elimination. In some cases, fumigation may be necessary for severe infestations.
The Role of Termite Inspections in Real Estate Transactions
In many states, a termite inspection—often called a Wood-Destroying Organism (WDO) or Wood-Destroying Insect (WDI) report—is a required part of the home buying and selling process. Lenders typically require a clear report before approving a mortgage, and buyers use it as a condition of sale. The inspection is a visual examination of the property's accessible areas, including the foundation, crawlspace, attic, and exterior. The inspector looks for signs of current or past termite activity, such as mud tubes, damaged wood, or evidence of previous treatment. They will also note conditions that are conducive to termite infestation, like wood-to-soil contact or excessive moisture. If an infestation is found, the buyer can negotiate for the seller to cover the cost of treatment and repairs. A history of termite damage, even if treated, must be disclosed in many states. That's why it's essential for sellers to address any termite issues before listing their home.
The research on termites in U.S. homes
The statements below are tied to named surveys, studies and published cost guides, and each one says what it does and does not prove. They describe patterns across many households, which is useful context, not a diagnosis of any one property. Thirty-five percent of U.S. homeowners in National Pest Management Association (NPMA) and Harris Poll research released March 24, 2026, said they had taken preventive measures against termites, a self-reported action rather than a verified record of treatments or inspections. Whole-house tenting is the exception, not the rule: 16% of locations in Pest Control Technology (PCT) magazine's 2025 termite market report (about 145 professionals, 2024 operations) offered fumigation, so a homeowner quoted a tent job is buying a specialist service; the figure counts companies. According to the NPMA/Harris Poll findings released March 24, 2026, only 16% of U.S. homeowners preferred DIY termite control to hiring a professional; the figure reflects stated intentions, not measured purchasing behavior. In findings from the National Pest Management Association (NPMA) and Harris Poll released March 24, 2026, fewer than half of U.S. homeowners, 45%, thought prevention was cheaper than termite damage repair; the figure reflects attitudes, not actual spending. In HomeTeam Pest Defense's March 2022 online survey of U.S. homeowners ages 25 to 75, 37% reported trying DIY pest control; because the sponsor sells professional service and the sample was undisclosed, treat the figure as self-reported, not a national estimate. Use these numbers as context, not as a diagnosis. A provider's written inspection findings should drive the treatment plan, and any quote should spell out how many visits, which areas and what follow-up it covers.