What could indicate the presence of a termite colony in a structure?

The presence of wood dust or frass is a strong indicator of a termite colony in a structure. Termites consume wood as a food source, and as they chew through it, they generate a fine powdery substance known as frass, which is essentially their excrement combined with wood particles. Finding this material in or around a structure suggests that termites have been actively feeding on and infesting the wood, making it one of the most noticeable and direct signs of a termite problem.

While other factors like sudden temperature changes, condensation on windows, and increased humidity levels may indirectly relate to pest issues or conditions favorable for infestations, they do not specifically indicate the presence of termites in the same definitive way that wood dust or frass does.