East of the Cascades the wood-destroying insect that does the most damage to houses is not the termite — it's the carpenter ant, working a sill plate that a hose bib has kept wet for ten years or a deck ledger bolted straight to the siding of a 1950s house near Moore Park. Subterranean termites do occur in the Klamath Basin, less often than in the valley, and wood-boring beetles turn up in the old barn timber and log construction out toward Chiloquin and Bly. All three are structural-category work in Oregon, and a licensed local pest operator holding that category calls back with a free quote after an inspection that says which one you have.
Reading the damage
Carpenter ants leave galleries that are smooth, clean, and sanded-looking, with piles of fine frass — sawdust mixed with insect parts — below a kick-out hole; the ants themselves are large, black or black-and-red, and appear indoors in late winter when the house is the only warm thing for miles. Subterranean termites build mud shelter tubes up a foundation wall or a pier, eat along the grain leaving mud-packed, layered galleries, and swarm briefly on a warm spring day. Beetle damage shows as small round or oval exit holes in bare wood with powdery frass, most often in older, never-treated lumber. Each calls for a different response, and guessing from a photo is exactly how homeowners spend money on the wrong treatment. The inspection is the job's first half.
Treatment, and the moisture underneath it
Carpenter ant work follows the colony: the parent nest is usually outdoors in a stump, a landscape tie, or a woodpile, and the satellite nest in the house is in whatever the water reached. Non-repellent perimeter treatment, baiting where foraging is visible, direct treatment of the nest void, and — this is the part that lasts — fixing the leak, the grade, the sprinkler, or the earth-to-wood contact that made the wood attractive. Subterranean termite treatment means a liquid soil barrier around the foundation or a bait-station system monitored over time, done by an applicator licensed in Oregon's structural category with the equipment to trench and rod a foundation properly. Beetle work ranges from surface treatment of accessible timber to replacing what's too far gone. Fumigation is not something anyone on this bench will promise you; it's a separate license class and rarely the right answer in a dry, cold basin.
Buying, selling, or refinancing?
This is the page that meets the real-estate calendar. Lenders — and every VA lender in Oregon now — want a wood-destroying-insect inspection report before closing, and findings on that report need a licensed treatment and a clearance letter to keep a deal moving. The real estate pest inspection page for Klamath County covers the report itself; this page covers what happens when it finds something. Either way the first step is the same free call, and ordinary indoor ants that turn out to be the small brown kind go back to the ant control page.