Every Sydney roof
is a catchment.
Yours is blocked.

The strata committee's complaint was not about water damage. It was about a WorkSafe notification. A pest controller conducting a routine inspection of the loading dock area had found standing water in the box gutters — visible from the yard through a gap in the parapet capping — and had identified it as an active Aedes notoscriptusbreeding site. The notification went to the strata manager that afternoon.

When our crew reached the roof, the situation was more extensive than the pest controller's report had suggested. The three-metre box gutters ran the full perimeter of the building — approximately 140 linear metres. Of that, roughly 80 metres contained standing water between 40mm and 120mm deep. The water was brown-black with tannin and covered in a thin biofilm. In multiple sections, we observed active larval activity.

"The leaf litter had decomposed into a kind of nutrient-rich slurry. It wasn't just blocking the downpipes — it was feeding the larvae. We found three distinct developmental stages in one 600mm section of gutter. This had been running through at least two or three breeding cycles."

The clearing job took a crew of four a full day. Forty-seven wheelbarrow loads of debris — measured, because the strata manager asked for documentation for the WorkSafe response. The downpipes had to be rodded from both ends; two required high-pressure jetting to clear a secondary silt blockage at the underground junction.

The follow-up pest treatment — required as part of the WorkSafe response — added $1,200 to the bill. The strata committee passed a motion at their December meeting to establish an annual maintenance contract. The total cost of the reactive clean, pest treatment, and WorkSafe documentation preparation came to $3,100. The annual contract they subsequently signed costs $890.

The dispute had been running for four months before we were called in. Unit 3B had reported a water stain on their bedroom ceiling in April. The strata manager had engaged a plumber, who found no leak in the internal pipework. A second plumber had reached the same conclusion. The stain was growing — slowly, incrementally, in the way that stains grow when the source is intermittent and weather-dependent.

Our inspector, Daniel Park, identified the problem within forty minutes of arriving on the roof. A single downpipe outlet on the eastern parapet — serving approximately 120 square metres of roof catchment — was blocked at the first junction, 600mm below the outlet. The blockage was a compressed plug of camellia leaves and decomposed organic matter, approximately 180mm long. Every time it rained more than 10mm per hour, the gutter overflowed, and water tracked along the parapet wall into the building cavity.

"One plug. One hundred and eighty millimetres of compressed leaf matter. That's all it was. Four months of dispute, two insurance claims, and fourteen thousand dollars in remediation — for something a gutter rod and thirty minutes of labour would have prevented."

By the time the source was identified, water had penetrated the external wall cavity, saturated the insulation batts, and damaged the plasterboard ceiling of both unit 3B and the unit directly below, 2B. The remediation required removal of ceiling plasterboard in both units, replacement of insulation, replastering, repainting, and temporary relocation of the tenant in 2B for eleven days.

The strata committee's annual maintenance budget for the building had never included a line item for gutter inspection. It does now. The contract they signed with us — covering all eighteen drainage points, twice annually — costs $1,200 per year. The excess on their strata insurance policy is $5,000.