German cockroaches favor warm, humid spaces near food and water — kitchens, behind appliances, under sinks — and Bertram's a humid subtropical climate in the Hill Country transitioning to a warmer, semi-arid climate farther south toward the Rio Grande Valley keeps them active most of the year. American cockroaches, larger and reddish-brown, prefer basements, drains, and utility rooms. A blend of Hill Country stone construction and warmer-climate South Texas homes built for heat rather than cold.
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.