Signs Rodents May Be Inside Your Roof or Walls

    Pest control technician inspecting a roof void access point with a torch

    Rodents such as rats and mice commonly enter Melbourne homes through roof voids, wall cavities, and subfloors. They are most active at night and can cause damage to wiring, insulation, and stored items. Recognising the early signs helps you act before the problem grows.

    Published 22 August 2026

    Signs to look for

    • Scratching, scurrying, or gnawing sounds at night, particularly from the ceiling or inside walls
    • Small, dark, pellet-shaped droppings in cupboards, along skirting boards, or in the roof void
    • Chewed packaging, wiring, or insulation in the roof or storage areas
    • Rub marks or dark smudges along walls and entry points where rodents travel
    • Nesting materials such as shredded paper, fabric, or insulation gathered in hidden areas
    • A persistent musty or ammonia-like odour in enclosed spaces

    What you can check safely

    • Use a torch to inspect the roof void entrance and visible subfloor access points from a safe distance
    • Check skirting boards and behind appliances for droppings or rub marks
    • Listen for sounds at night, particularly in the hours after dark
    • Inspect stored items in garages, sheds, and roof spaces for chew marks or nesting

    What to avoid

    • Do not block suspected entry holes before confirming where the rodents are travelling
    • Do not use outdoor bait stations indoors unless specifically directed by a professional
    • Do not disturb a nest you have found — note the location and seek professional advice
    • Do not assume one rodent means only one is present

    When to seek professional inspection

    • You hear repeated sounds over multiple nights
    • You find fresh droppings or nesting material
    • You notice damaged wiring or insulation
    • You see a rodent during the day, which can indicate significant activity

    Melbourne context

    Melbourne's older homes, particularly those with tile roofs and timber subfloors, can provide easy access for rodents. Cooler months often drive rodents indoors as they seek warmth and shelter. Properties near creeks, parks, and open reserves may experience more seasonal rodent movement.

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