Roof Rat 

Norway Rat

Other Names: Black Rat, Fruit Rat, Ship Rat, Alexandrian Rat

If there is plenty of food and shelter, Roof Rats will gladly live in close proximity to humans, particularly in attics, ceilings, or wall areas. Roof Rats inhabiting upper areas of buildings or homes often gnaw on wires found there, possibly leading to fires, outages, and production down-time.

Identify Damage

Droppings | Gnaw Marks | Sounds & Odors

Droppings, gnaw marks, and urine odors are just a few signs of rat activity.


Droppings are the most commonly encountered evidence of rodent activity. Even a small rat infestation can produce literally thousands of droppings in a short period of time.

An adult rat typically produces 40 to 50 droppings per day. These fecal pellets are usually dark-colored, 1/2 inch in length, and pointed at both ends.


Gnaw Marks 

Evidence of recent gnawing is an excellent sign for determining the presence of Roof Rats.

Rats tend to gnaw on wooden structures such as corners, floor joists, and wall studs.When Roof Rats gnaw holes into cartons and boxes, the holes typically measure about 2 inches in diameter and contain rough, torn edges.

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Sounds & Odors 

Another indication that rats are present is a strong musty odor. Cats and dogs may sniff excitedly and probe an area where rats or mice are present and will often indicate this by scratching or making unusual sounds.

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