How Do Professionals Remove Rat Infestations?

A technician surveys interior and exterior, distinguishing active signs (fresh droppings, live sightings, oily rub marks) from old ones, locating burrows and runways, identifying the species — in NH, effectively the Norway rat, since roof rats are generally absent from the region — and assessing harborage like woodpiles and debris. This step determines everything that follows: exclusion points, trap placement, and whether bait is warranted at all.

NPMA and University of Nebraska Extension identify exclusion as the single most important long-term measure: sealing every gap a rat can use — rats need only slightly more than ½ inch — using gnaw-resistant materials like metal mesh and hardware cloth rather than foam alone. Skipping this step is why some rat problems reappear after treatment; trapping without exclusion just clears space for the next rats to move in.

Next comes population knockdown — primarily snap and multiple-catch traps, and, where warranted, rodenticide baits applied strictly according to the product label and typically placed in tamper-resistant stations to protect children, pets, and non-target wildlife. Finally, follow-up: monitoring stations, re-inspection, and sanitation or harborage removal, because — as Utah State Extension stresses — killing rats without removing the conditions that let them thrive just invites reinvasion. Reputable NH providers work under state licensure; Anchor holds NH commercial applicator #782664, category F1 under RSA 430. No responsible provider quotes a flat price sight-unseen, since scope depends on the inspection.