Cockroaches need three things to establish a colony: food, water, and warmth. Petrolia's housing stock gives them exactly that. A mix of older wood-frame homes built into forested terrain and newer construction, most vulnerable to moisture given the persistently wet climate. Combined with Petrolia's climate — a temperate rainforest climate typical of the redwood coast, wetter and cooler than almost anywhere else in the state — indoor cockroach pressure rarely lets up on its own.
We start with an inspection to identify the species and the source — sanitation issue, moisture problem, or entry point. Treatment centers on gel bait placed in cracks, voids, and under appliances, not broadcast spraying, since German cockroaches in particular have developed resistance to many surface sprays. A follow-up visit confirms the bait is working and the population is dropping.