What is the best way to detect galleries in wood?

Tapping on the wood every few inches with a screwdriver is an effective method for detecting galleries created by wood-destroying insects, such as termites or beetles. This technique allows the inspector to listen for differences in sound; solid wood produces a sharp, crisp sound, whereas wood that is hollowed out by insect activity will emit a dull thud. By systematically tapping and assessing the sound patterns, one can identify areas where galleries may be present.

Other methods, like visually inspecting for discoloration or using a moisture meter, can provide useful information but may not be as direct in identifying the presence of insect galleries. Discoloration could indicate various issues, including moisture damage, without specifically confirming insect activity. Similarly, a moisture meter measures the moisture content in wood, which could indicate conducive conditions for pests but does not directly reveal hidden galleries. Applying insect repellent offers a preventive measure rather than a detection method and does not assist in identifying existing wood damage.