Unlike the ground-dwelling Norway rat, roof rats are agile climbers that prefer nesting up high — in attics, roof voids, and dense trees or vines close to a building. They often enter through roof gaps, overhanging branches, and utility lines that provide a direct route to the upper floors.
Scratching sounds in the attic at night, chewed insulation, and droppings near stored items are common signs of activity. Trimming tree limbs away from the roofline and sealing attic vents and roof gaps are key preventive steps alongside professional trapping and monitoring.