A Claremont property manager found German cockroach infestation in a 2-bedroom apartment after a 3-year tenancy ended. New tenant moving in 4 weeks. Verminator cleared the infestation in 2 visits over 3 weeks and issued a 6-month guarantee to the incoming tenant.
The property manager inspected a 2-bedroom apartment in Claremont on the day the previous tenants vacated after a 3-year tenancy. Kitchen inspection found German cockroach activity: frass behind the freestanding fridge, live specimens in the motor cavity of the underbench dishwasher, and egg cases (oothecae) in the gap between the built-in oven and the adjacent cabinet. The new tenant was scheduled to move in 4 weeks later. The manager needed the infestation cleared and documented before occupation.
Full kitchen harbourage inspection with appliances moved and accessible cavities opened. German cockroach confirmed active in dishwasher motor, behind fridge, and in the oven-cabinet gap. Secondary harbourage in the bathroom under-vanity cabinet and hot water cylinder cupboard. Bait-only programme applied to all 6 confirmed harbourage points. 3-week follow-up visit confirmed eradication. 6-month guarantee issued for the incoming tenant.
The vacant apartment allowed complete inspection access — appliances pulled away from walls, all cabinet undersides accessible, no occupants requiring coordination. Dishwasher pulled forward: active German cockroach in motor cavity and behind the drain hose junction. Fridge pulled forward: frass accumulation behind the compressor housing. Oven pulled slightly forward: 3 egg cases (oothecae) in the 8mm gap between the oven side panel and the cabinet wall, indicating a population that had been established long enough to be actively breeding in that location. Bathroom: frass under the vanity cabinet at the hot water pipe penetration, and a single adult specimen in the hot water cylinder cupboard. Six confirmed harbourage points across 2 rooms.
Professional gel bait applied at all 6 harbourage locations. Dishwasher motor cavity and drain junction: bait placed inside the motor housing using a flexible application tip. Fridge compressor cavity: accessible from the rear; bait applied at the compressor face and heat-exchange area. Oven-cabinet gap: bait applied to the floor of the gap accessible from the front — the same entry route the cockroaches were using. Bathroom: under-vanity at the pipe penetration, hot water cylinder cupboard base. Applicator's recommendation to the property manager: include in the tenant handover brief that no residual spray should be applied in the kitchen during the guarantee period, as this disrupts bait uptake at active stations.
Return inspection one week before the new tenant's move-in date. All 6 harbourage points inspected: zero live activity at any location. Dishwasher motor: no specimens, no fresh frass. Fridge compressor: clear. Oven gap: no activity, egg cases confirmed non-viable. Bathroom: clear. Full inspection of all cabinet undersides and visible skirting junctions: no activity anywhere in the apartment. Infestation confirmed eradicated. 6-month guarantee issued. Property manager received written inspection report documenting the pre-tenancy state, treatment conducted, and outcome — suitable for the tenancy file and deposit claim documentation.
A vacant apartment is the best possible window for German cockroach treatment. Complete appliance access, no household to brief, no operational constraints. The 4-week vacancy window between a 3-year tenancy and a new occupant was enough time to find the infestation, treat it, confirm eradication, and issue a guarantee. The new tenant moved in to a clean property with a documented treatment history.
German cockroach infestations in rental properties are almost always the result of accumulated harbourage that develops over the tenancy period. Foraging cockroaches exploit kitchen environments gradually: motor cavities in refrigeration units accumulate warmth and grease, cardboard packaging provides shelter, and gaps between built-in appliances and cabinetry offer protected nesting space. In a 3-year tenancy, a population that begins as a few specimens in a delivery box can establish stable harbouring across multiple kitchen zones.
By the time the outgoing tenants vacated, the population in this apartment had been producing egg cases in the oven-cabinet gap — a sign of extended, stable colony presence in that location. The frass distribution behind the fridge and in the dishwasher motor indicated the infestation had spread from an initial source across at least three separate harbourage points.
The property manager who commissioned this case conducted an exit inspection on the day of tenancy end — not when the new tenant was about to move in. This sequencing was critical. It provided 4 weeks for treatment, rather than a rushed window that would have required an occupied treatment with the new tenant already in residence.
Exit inspection also provided the documentation trail needed for the deposit process: photographs of the infestation evidence, the pest control company's inspection report noting the pre-treatment state, and the final treatment invoice. Without an exit inspection, attributing the infestation to the previous tenancy — rather than the incoming tenant — would have been much harder to establish.
A bait-only programme in a vacant apartment has no practical downsides. There is no odour issue — gel bait applied in small quantities at harbourage points has no detectable odour in the broader space. There is no requirement for the space to remain vacant after treatment. There is no surface contamination to clean before food-preparation use. The new tenant moved into the apartment 7 days after the follow-up confirmation visit, with no preparation required and no wait period.
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