Mould, roofs and pressure cleaning in Indooroopilly, Kenmore and Chapel Hill

It is not your render and it is not your paint. It is the microclimate. These suburbs sit in folded, hilly country with a lot of retained tree cover, and a house tucked into a gully or backing onto bushland does not get the hours of direct sun that burn moisture off a wall. Dew sits until late morning. South and south-east walls barely dry through the wet months.

Mould does not need dirt. It needs moisture, shade and something to sit on, and a painted or rendered wall gives it all three. That is why a house out here can be cleaned, look immaculate and be patchy again in eighteen months, while an identical house on a sunny Sunnybank block looks fine after five years.

So the method matters more than the pressure. Soft washing kills the growth chemically and removes it. High-pressure blasting knocks the visible layer off, leaves the root structure in the surface and lets it return faster, while damaging the render. If the same wall keeps going green, that is very likely what has been happening.

Roofs follow the same pattern: under tree cover, lichen gets into concrete tiles years earlier, and the shaded half of the roof is always worse.

Mould on an exterior wall turns up in routine inspection reports constantly out here and lands on a property manager's desk. We make it easy: we deal with the tenant directly about access, photograph before and after, and invoice the agency rather than chasing anybody.

We will also tell you when a wall does not need us. Some marking is staining in the paint rather than live growth, and washing will not change it. Repainting is the honest answer there.

For end-of-lease and pre-listing work, the useful combination is usually a soft wash of the affected walls, a driveway and path clean and gutters cleared: the three things that show in an inspection and in the photos.