Dampwood termites typically infest damp and decaying timber. This species is commonly found in the Pacific Coast states, such as Montana, Idaho, Northern Nevada, Oregon, Northern California and Washington. Other but less damaging species are found in areas of Southwest USA and Southern Florida.
Dampwood termites do not create shelter tubes as with subterranean termites. The appearance of timber damaged by dampwood termites can be varied but they always eat across the grain, consuming both spring and summerwood. While doing this, they make a series of chambers or galleries connected by tunnels whose walls are smooth as though they are finely ‘sandpapered’.