Arizona homeowners deal with two primary rodent pests that require very different control strategies: the roof rat (Rattus rattus) and the pack rat, also called the white-throated woodrat (Neotoma albigula). Roof rats are slender, agile climbers that enter homes through the roofline — gaps around pipes, vents, and eaves — and nest in attics, wall voids, and above drop ceilings. They are nocturnal and rarely seen during the day, but their presence is revealed by droppings (dark, spindle-shaped, about 0.5 inch), gnaw marks on wiring and wood, and scratching sounds in the ceiling at night. Pack rats are desert-native rodents that build large stick nests (middens) in desert landscaping, under vehicles, and in outdoor storage areas. They are attracted to shiny objects and will collect coins, keys, and other small items.

Roof Rat Control: Exclusion First

Roof rat control requires a two-phase approach: exclusion and population reduction. Exclusion means sealing every entry point larger than a quarter-inch — gaps around pipes, utility penetrations, vents, and the roofline. This is the most important step because trapping without exclusion is a losing battle; new rats will continue to enter as fast as you remove them. Population reduction uses snap traps (the most humane and effective method) placed along walls and in the attic where rats travel. Bait stations with rodenticide are used for outdoor populations but require careful placement to prevent non-target wildlife exposure. Pack rat control focuses on removing the nest (midden) and the attractants — clearing debris, moving wood piles away from the home, and treating the area with a repellent or rodenticide bait station.

Why Rodent Control Is a Safety Issue

Rodents in Arizona homes pose serious health and property risks. Roof rats chew electrical wiring — a leading cause of house fires — and contaminate food and surfaces with hantavirus, leptospirosis, and salmonella. Pack rat urine and feces can also carry hantavirus. The cost of rodent damage repair (rewiring, insulation replacement, structural repairs) far exceeds the cost of professional exclusion and control. At Pest Control Bros, we provide comprehensive rodent inspections, exclusion services, and population control throughout our Arizona service area. Call (520) 424-5244 for a free inspection.