Expert Pest Control Services in Vancouver, Washington

These tiny dark-brown ants are the number-one nuisance ant in the region, and they love Vancouver's moisture. They slip through foundation cracks and follow plumbing into kitchens and bathrooms, hunting sweets and water. Crush one and you'll notice a rotten-coconut smell — that's the giveaway. Warm spells can wake colonies as early as January along the I-5 corridor, so don't wait for spring to take a trail seriously. The fix is slow-acting bait that foragers carry back to the colony; spraying the visible line usually just splits one colony into two.

The Pacific Northwest's most destructive ant doesn't eat wood — it excavates damp wood to build nests, and Vancouver's wet winters keep plenty of framing soft. Look for large black ants, piles of sawdust-like frass below window frames or deck ledgers, and winged swarmers in spring. The visible ants are scouts; the colony is often inside a wall or sill plate. Treatment removes the nest and satellite colonies, and just as important, the moisture problem that invited them gets flagged so it can be fixed.

Roof rats are excellent climbers, and the Columbia River corridor gives them everything they like: water, dense ivy, fruit and nut trees, and older attics with generous gaps. They're most common in Fruit Valley, the waterfront neighborhoods, and anywhere mature landscaping meets the roofline. Signs include gnawed wiring or insulation, droppings along fence tops and rafters, and scratching overhead at night. Control pairs trapping and removal with exclusion — sealing every gap wider than a thumb — because new rats will simply move into the same openings.

By late summer, yellow jacket and hornet colonies reach peak size and their workers turn aggressive around food, drinks, and trash. Nests hide underground, in wall voids, under eaves, and in shrubs — and a colony disturbed by a mower or a curious kid can sting in numbers. Store-bought traps stop foragers but never touch the colony. Professional removal takes out the nest itself, usually handled in the evening when workers are home, and we advise on keeping food waste sealed through the season.

Termites get less attention than carpenter ants here, but western subterranean termites are present wherever soil stays moist against the foundation — and in Vancouver, that's a lot of houses. They travel through mud tubes and hollow out wood from the inside, so damage can run deep before anyone notices. A professional inspection checks foundations, crawl spaces, and sill plates for tubes and damaged wood. Treatment uses targeted soil barriers or baiting systems, and because these termites need ground contact, fixing drainage and soil-to-wood contact matters as much as the treatment.

Hobo spiders build funnel-shaped webs in basements, crawl spaces, garages, and window wells across the Portland-Vancouver area, and late summer is when the males wander and get noticed. They prefer dark, undisturbed spots at ground level, so cluttered storage rooms and unsealed foundation gaps roll out the welcome mat. Control focuses on removing webbing and harborage, sealing ground-level entry points, and targeted exterior treatment along the foundation. Simple habits help too, like moving firewood and boxes away from the house.

Homes near the Columbia River, Vancouver Lake, Salmon Creek Greenway, and Burnt Bridge Creek get longer, heavier mosquito seasons than the rest of town. Females need only a bottle cap of standing water to breed, so clogged gutters, saucers, tires, and low spots in the yard all count. The most effective approach starts with source reduction: dumping and draining breeding spots. Next comes larval control in water that can't be drained. Then barrier treatments around patios and decks before outdoor season peaks.