Few people really like rats or mice, and no one wants them in their house. Rodents live everywhere outside and could enter at any time, but fortunately, this does not occur often.
Usually, most home invasions occur in the autumn months, because the seeds and plants on which rodents feed are gone. Rats and mice must then seek new food sources in the homes.
Rats are excellent climbers and capable of gaining entry through holes around vents and around cables entering the building, through holes in gable vent screens, and through turbine and box vent on roofs. Many garage doors in homes allow enough space for rats to fit underneath, as well.