Roof Rat Infestation: Identification, Control, and Professional Eradication

Roof rats breed four times yearly—"prolific daters" that turn a single invader into a colony rapidly. Early detection and professional intervention prevent structural damage, disease risk, and exponential population growth.

Infestation Indicators

• Nocturnal sounds: scratching, gnawing, scurrying in attic/walls
• Droppings (spindle-shaped, 1/2")
• Urine stains (fluoresce under UV light)
• Gnawed wiring, insulation tunnels, rub marks on beams
• Nests in insulation

Professional Eradication Protocol

1. Exclusion First: Seal ALL exterior entry points (>1/2") before trapping—prevents immigration/emigration
2. Trapping Program: Professional snap traps (superior to live traps), secured against drag-off, placed in attic runways
3. Food Elimination: Remove competing food sources (pet food, fallen fruit, accessible garbage) to maximize bait acceptance
4. Monitoring: Check traps daily. Reset/re-bait. Continue 3 weeks typical for full colony capture

Why DIY Fails

Roof rats are neophobic—avoid new objects for days. Improper trap placement, insufficient exclusion, and available alternate food doom amateur efforts. Professionals understand behavioral ecology and deploy accordingly.

Health and Property Risks

Roof rats transmit leptospirosis, salmonellosis, rat-bite fever. Gnawing causes electrical fires. Insulation destruction reduces energy efficiency. Professional eradication is a health and safety investment, not just pest control.

Local Expertise

Glendale, AZ residents: Invader Pest Management offers free inspections and species-specific treatment plans. Don't wait for the population to explode.