Rodents, primarily house mice and Norway or roof rats, are among the most damaging and persistent pests homeowners and businesses face. They are highly adaptable, reproduce quickly, and can squeeze through surprisingly small gaps to get indoors, especially as temperatures drop and outdoor food and shelter become scarce. A single female mouse can produce dozens of offspring in a year, which means a small, unnoticed entry point can turn into a full infestation within a few months.
Beyond the unsettling experience of sharing a home with rodents, they pose real, well-documented risks: they contaminate food and surfaces with droppings and urine, gnaw through electrical wiring and structural materials, and can carry pathogens linked to serious illness. Rats and mice also differ in behavior in ways that affect treatment, rats are more cautious and travel established routes, while mice are curious and will explore new areas quickly, so an effective plan accounts for the specific species involved.
Because rodents are resourceful and reproduce fast, the most reliable long-term solution is not a single treatment but a program: finding and sealing entry points, removing food and water sources, trapping the existing population, and monitoring to confirm the problem is actually resolved rather than just temporarily reduced.
What It Looks Like
Norway rats are stocky rodents 7-9.5 inches long (plus a 6-8 inch tail) with brown or gray shaggy fur, small ears, and blunt noses. Roof rats are slightly smaller and more slender, with sleek black or brown fur, large ears, and a tail longer than their body. House mice are much smaller, typically 2.5-3.75 inches long with a proportionally long, thin tail, dusty gray fur, and large ears relative to their head size.
Where It’s Commonly Found
Rodents seek shelter close to food and water, commonly nesting in attics, wall voids, crawlspaces, basements, garages, and behind kitchen appliances. Norway rats prefer burrowing at ground level near foundations, woodpiles, and under sheds, while roof rats are agile climbers often found in attics, trees, and roof eaves. House mice can squeeze through gaps as small as a quarter-inch and readily nest in insulation, cardboard boxes, and cluttered storage areas.
Signs of an Infestation
- Small, dark droppings (rice-grain sized for mice, larger spindle-shaped for rats) along baseboards, in cabinets, or attic spaces
- Gnaw marks on wood, wiring, food packaging, and structural materials
- Greasy rub marks or smudges along walls and entry points from repeated travel
- Scratching or scurrying noises in walls, ceilings, or attics, especially at night
- Nesting material such as shredded paper, fabric, or insulation in hidden corners
- A stale, musky odor in areas of heavy rodent activity
Health & Property Risks
Rodents can transmit diseases to humans through droppings, urine, and saliva, including hantavirus, salmonella, and leptospirosis, and their fleas and ticks can carry additional pathogens. Perhaps the most costly risk is structural: rats and mice gnaw continuously to keep their incisors worn down, and chewing through electrical wiring is a documented cause of house fires. Contaminated food storage areas and insulation damage are also common consequences of an unaddressed infestation.
Treatment Options
- Thorough inspection to identify entry points, nesting sites, and the extent of activity before choosing a treatment plan
- Exclusion work to seal gaps, vents, and utility penetrations with rodent-proof materials so existing rodents can't return and new ones can't get in
- Mechanical snap traps placed along known travel paths for fast population reduction indoors
- Tamper-resistant, lockable bait stations placed in a perimeter pattern outdoors where label directions and local regulations allow, reducing risk to children, pets, and non-target wildlife
- Multi-catch or live-catch trapping options for situations where non-lethal control is preferred
- Follow-up visits to monitor trap activity, replenish stations, and confirm the infestation has been resolved
- Attic or wall-void cleanup and sanitization when droppings or nesting material have accumulated
Products & Methods We Use
- Mechanical snap traps and multi-catch live traps
- Tamper-resistant, lockable exterior bait stations
- Rodenticide bait blocks used only where appropriate and in compliance with label and local regulations
- Exclusion materials such as galvanized hardware cloth, steel wool, and copper mesh for sealing gaps
- Sealants and door sweeps to close off entry points around pipes, vents, and foundations
- Enzyme-based cleaners for sanitizing areas with droppings or urine contamination
Prevention Tips
- Seal gaps larger than a quarter-inch around pipes, vents, and the foundation with steel wool or hardware cloth
- Store food, including pet food, in sealed containers rather than paper or cardboard packaging
- Keep outdoor trash in cans with tight-fitting lids and clean up fallen fruit or birdseed
- Trim tree branches and shrubs back from the roofline to remove easy access points
- Reduce clutter in garages, basements, and attics where rodents like to nest
- Repair damaged screens, vents, and weather stripping promptly