Hartwick's housing stock shapes exactly where rodents get in. A blend of established manufacturing-era neighborhoods and newer suburban growth along the Mississippi River corridor. Combined with the area's climate — a humid continental climate with hot, humid summers and cold winters, somewhat more humid than western Iowa given the Mississippi River's influence — rodents seeking shelter from weather extremes make a beeline for any accessible gap.
Exclusion is the core of effective rodent control: finding and sealing every gap a mouse or rat could use to get inside, since traps alone just remove the current population without stopping the next one. We pair exterior sealing with interior trapping or bait stations, then follow up to confirm the problem is resolved.