Sewer rats are also called brown rats, grey rats and Norway rats. Their ears are small and appear to be half buried in its fur. They are reddish-brown or greyish-brown. Very gregarious, rats usually live in very hierarchical groups.

Development and Behaviours

Female rats can have four to six litters per year, each with eight to twelve babies. The rat’s life span, in their natural environment is approximately one year; males live generally longer than females. Rats usually come out at night and normally are more active when people are away from home. When they are starved or used to a location, these rodents can also feed during the day. They prefer food that is rich in fats, but since they are not difficult, they will eat whatever they can find. Their senses of smell, touch, taste, and hearing are very well-developed. However, their vision is weak. They are suspicious by nature, especially the adults, and any new objects in their territory will cause them to react. Rats are excellent swimmers. They establish themselves usually near a water source, whether its a sewer or water pipes that sweat because they must drink at least once per day.


  • Check the plumbing system, since 99% of the time, it is through there that rats find their way into buildings. A backflow valve is often the first line of defense in urban areas against these pests that invade our sewers.
  • Make sure that garage doors as well as other house entryways are sealed and properly shut.
  • Keep all household waste in adequate containers. In the case of an inside rat infestation, food must also be kept out of their reach in sealed containers as much as possible. Do not use any poison inside, because rats like to store food that interests them in hiding places. This poisoned food could then be accessible to children or pets, or even be in contact with other food. These dangerous products can then cause more problems than they fix. Cadavers of poisoned rats can also cause odours and attract flies in places that are potentially inaccessible.

Contact us for assistance by expert extermination professionals who can provide you a safe and effective approach against a rat infestation. We can also simply establish an infestation prevention plan for any buildings at risk, such as restaurants, garages and warehouses.