As an Amazon Associate, we earn from qualifying purchases. This post may contain affiliate links.
By Luis Gustavo. See how we research and review our content.
A piece of furniture that looks solid from the outside can be completely hollow inside, and the first visible clue is often just a slightly harder tap making the wood give way. Unlike other household pests that hide but still leave everyday signs, termites work silently, inside the very structure they’re attacking, which is why the financial damage usually only becomes news once it’s too big to fix with an off-the-shelf product. Understanding how an infestation starts is the first step toward stopping it before it gets expensive.
What actually causes a termite infestation
The two most common termite groups behave very differently. Subterranean termites live in soil-based colonies and build mud tubes to reach wood in direct contact with the ground, like door frames, baseboards, and roof structures near damp foundations — soil moisture is essential for this species’ survival, so leaks, garden beds pressed against a wall, or poor drainage sharply raise the risk. Drywood termites, on the other hand, don’t need soil contact at all: they infest furniture, doors, molding, and roof structures directly through tiny cracks, often arriving already inside a piece of used furniture bought without inspection, or through aerial swarms that fly at night toward light and slip in through window gaps. In both cases, wood with no prior termite treatment (no protective varnish or manufacturing-stage product applied) is far more vulnerable, and the problem tends to develop over months or even years before any external sign shows up.
The real damage from an untreated infestation
The cost of a termite infestation is rarely just cosmetic. Wood structures supporting roofs, beams, and staircases can lose significant mechanical strength before any crack becomes visible from the outside, creating a real collapse risk in extreme, long-untreated cases. Furniture with sentimental or financial value, like antique cabinets or solid hardwood floors, often has to be discarded entirely once the infestation has gone too far to repair, since termites don’t just attack the surface — they hollow out internal galleries that compromise the whole piece. Financially, a home’s resale value drops when an inspection finds signs of active infestation or an untreated history, and the cost of structural repair tends to run far higher than the cost of preventive control done in time — the price gap between acting early and acting late is usually measured in multiples, not percentages.
What tends to make an active infestation worse instead of better
A common mistake is treating only the spot where termites were spotted, ignoring that it’s just the visible tip of a colony that can extend across several meters of underground tunnels or across multiple connected pieces of furniture. Spraying contact insecticide directly on the visible insects only kills that specific group, without affecting the queen or the rest of the colony, which keeps producing new individuals — that’s why the infestation often “comes back” weeks later, creating the false impression that the product simply didn’t work. Another mistake is confusing a seasonal swarm of flying reproductive termites with an active infestation already inside the home: aerial swarms show up seasonally and don’t necessarily mean a colony is already established in the structure, but they shouldn’t be ignored either, since they indicate a colony close enough to send flying reproductives toward the house. Putting off a professional inspection because it “looks like just one piece of furniture” also gets expensive, since subterranean termites spread invisibly under flooring from one room to another.
How to get rid of and prevent a termite infestation
The most effective method against subterranean termites is usually bait stations or gel containing insect growth regulators, placed at identified activity points: worker termites carry the product back to the colony and share it with other individuals, including the queen, which interrupts reproduction instead of just killing whoever is visible at the moment of application — that’s the practical difference between control that actually works and a spray that just pushes the problem down the road. For drywood termites already inside a specific piece of furniture, gel applied directly into the visible galleries usually handles small, localized infestations, but larger infestations spread across multiple points of a home’s structure call for evaluation by a licensed pest control company, which can recommend heat treatment or fumigation depending on the case. As prevention, it helps to eliminate direct wood-to-soil contact (using concrete or metal bases on exterior structures), fix leaks and drainage problems near the foundation, and inspect used furniture before bringing it inside — prevention costs a fraction of what repairing an already-compromised structure does.
Anyone dealing with other household pests may also want to check our article on ants at home, since a lot of the prevention strategies overlap across different types of infestations.
Recommended Products
Termite Bait Stakes — placed around the perimeter of the home to intercept subterranean termites before they reach the structure.
Termite Detection Moisture Meter — helps spot the damp spots in walls and framing where termites are most likely to establish a colony.
Disclosure: this is our tracked affiliate link.
Have you ever found termite damage in a piece of furniture or in your home’s structure? Save this article before a small problem turns into an expensive repair.