Drywood vs. Subterranean Termites in Southern California

Different colony environments

Drywood termites can establish within sound, dry wood. Subterranean termites usually maintain a connection to soil or another reliable moisture source.

Different visible clues

Drywood termites often push hard pellet-like frass from small openings. Subterranean termites are associated with mud tubes and concealed travel from soil into a structure.

Why the distinction matters

Treatment scope and access can differ substantially. A complete inspection should consider both possibilities rather than identifying the termite solely from where damage is first noticed.

The first visible sign may be far from the source

Drywood termites can remain inside a piece of wood, while subterranean termites travel through concealed routes from soil. Swarmers may move toward light and appear at a window even when the colony is elsewhere. A whole-structure inspection is more reliable than judging the problem from one damaged spot.

Why treatment discussions start with identification

Access, colony location, and the extent of activity influence which options are reasonable. Ask how the evidence supports the identification, what areas can and can’t be inspected, and how follow-up will show whether activity has stopped.

Questions worth asking after the inspection

Ask which termite type the evidence supports, whether the signs appear active, what areas were inaccessible, and how the proposed scope matches the findings. Clear answers make it easier to compare options without assuming that every termite problem requires the same treatment.

What to do next

Record what you see before cleaning or applying a product. If the evidence keeps returning, could involve damage, or is difficult to identify, compare it with the termites identification guide. The related termite control page explains inspection and service considerations.