Do roof rats harm people or property?
Arguably the most problematic of all pest animals, roof rats can destroy grain supplies, spread disease, and damage the attics and rooftops of buildings. They often invade attics in the winter and spring to escape the cold or to nest and raise their young. Roof rats are strong animals that can damage the shingles, fascia board, soffits, and vents of the structures they enter. Once inside, they commonly destroy insulation, ductwork, wiring, and drywall with their urine, feces, and constant gnawing. Water damage can also become a problem at the entry point.