Cockroaches are generally brought into restaurants and food service facilities with deliveries, supplies, or even employee belongings. Some species can travel between and enter buildings through drain/sewer pipes. Once they are in, they survive when food and water are available. They reproduce rapidly and thrive in hard-to-reach cracks and crevices that offer warmth and humidity.
There are a number of steps that can be taken to prevent entry of cockroaches and other pests: