Smokybrown cockroaches are highly dependent on moisture and tend to live outdoors in humid environments. They are strong fliers and are often attracted to lights at night, which can lead them toward homes and businesses.

Once inside, they are commonly found in attics, garages, or upper areas of structures, especially if entry points are present around rooflines, vents, or eaves. Homeowners may notice them around exterior lights, in sinks or bathtubs, or moving along ceilings and upper walls. Their presence is often more seasonal and tied to environmental conditions than indoor nesting.

While they do not typically establish dense indoor infestations like German cockroaches, they can still contaminate surfaces and become a recurring nuisance if outdoor conditions and entry points are not addressed. Reducing moisture, managing landscaping, and sealing access points are key steps in preventing activity.