If you live anywhere from Cairns to Tully, you know the tropics are brutal on a home's exterior. Humidity, rain and shade turn render, cladding and eaves green with mould and mildew fast. Here is how to deal with it properly — and why blasting it with high pressure is usually the wrong move.
Why tropical homes go green so quickly
Far North Queensland's warm, wet, humid climate is perfect for mould, mildew, algae and lichen. Shaded walls, spots under trees, and anywhere that stays damp are the first to go. Left alone it spreads and can start to break down paint and render over time.
Soft washing vs high pressure
High pressure can strip mould off a hard surface like concrete, but on render, painted walls, cladding and eaves it can force water behind surfaces and damage the finish. The safer method is soft washing — a low-pressure treatment that kills the mould at the root and rinses clean, rather than just blasting the surface layer.
Will it come back?
A proper soft wash treats the growth, not just the look of it, so it stays cleaner for much longer than a quick hose-down. In a tropical climate, an annual or twice-yearly wash keeps most homes on top of it. Heading through the dry season now is the easiest time to knock it back — get on top of it before the wet season rolls in and fires the mould straight back up.
Can I do it myself?
You can keep small areas in check, but the wrong chemicals or too much pressure can stain render, damage paint or push water where it should not go. For full house washes, second storeys and roofing it is safer to get the right gear and method.
Same goes for the decks, fences and outdoor areas
The soft-wash approach isn't just for walls. Timber decks and Colorbond fences go green just as fast and are just as easy to damage with too much pressure — worth sorting in the same visit while we're on site.
Book a local house wash
We soft wash homes across the Cassowary Coast. See our services or get a free quote — call 0481 787 960.