Norway Rat

Signs You Have Norway Rat

What homeowners spot first

1. Large droppings (3/4 inch) with blunt ends
2. Burrow holes along foundations (2-3 inches diameter)
3. Greasy rub marks along walls and pipes
4. Gnaw marks on wood, plastic, and even concrete
5. Sounds of gnawing, squeaking, or running at night
6. Strong ammonia-like odor in enclosed areas

Norway rats are nocturnal and strong swimmers. They dig extensive burrow systems under buildings, along foundations, and into embankments. They prefer to nest at ground level or below, and they're cautious about anything new in their space (which is why they're tough to trap the first few nights).

We take an integrated approach to Norway rats: inspect to find entry points and burrows, seal those gaps, then knock down the population with traps or tamper-resistant bait stations. We'll also walk you through the sanitation tweaks that keep them from coming back. Most jobs run 2-4 weeks depending on how big the infestation is.

What's the difference between Norway rats and roof rats?

Norway rats are bigger, with blunt noses, small ears, and tails shorter than their body. They stick to ground-level spots like basements, sewers, and burrows. Roof rats are sleeker, with pointed noses, large ears, and long tails, and they prefer attics, trees, and elevated areas. In the Treasure Valley we see Norway rats far more often than roof rats.

Can rats chew through concrete?

Norway rats can gnaw through soft concrete, cinder block, and most building materials. They can't chew through properly cured concrete, but they'll exploit any crack or gap that's already there. That's why sealing existing openings is the first line of defense.

How fast can you get rid of a rat problem in Boise?

Most Norway rat jobs in Boise take 2-4 weeks from first visit to fully knocked down, depending on how established the colony is. Trapping and bait placement usually show results within the first week, but full control needs the burrows sealed and ongoing pressure on the population. We offer same-day service if you book by noon, and our free re-service guarantee covers any return visits within the warranty window.