We clean homes on both sides of the harbour, and the difference is stark enough that we effectively run two playbooks. What attacks a Bondi facade and what attacks a Roseville one are different problems that happen to share a solution category.
East of the harbour: the salt playbook
From Bondi to Maroubra and around the harbour front to Vaucluse, the dominant force is airborne salt. It corrodes metal, hazes glass, feeds mould by holding moisture on surfaces, and — on the east’s abundant sandstone — drives salt attack that physically crumbles stone. Eastern work is about dissolving and flushing: plenty of fresh water, chemistry that lifts salt and kills growth, careful low pressure on the many heritage and sandstone surfaces. Frequency is driven by distance from the water, almost street by street.
North of the harbour: the canopy playbook
From Chatswood up the ridge through Lindfield, Killara and Turramurra, salt barely registers. The enemy is the thing everyone moved there for: tree canopy. Deep shade and high humidity mean algae, mould, moss and lichen colonise every slow-drying surface — south walls, roof valleys, brick fences, shaded driveways. Add year-round leaf litter loading the gutters and tannin stains under every overhanging gum. Northern work is about biocide and dwell time: killing growth at the root so it doesn’t return in a season, and clearing the organic supply lines (gutters, overhanging growth) that feed it.
The lower north shore — Mosman, Cremorne, Kirribilli — gets a blend: harbour salt at the waterline plus establishing canopy behind, often on century-old Federation surfaces that need the gentlest handling of all.
Why this matters when you’re hiring
A contractor who treats every house like a flat suburban brick box will use the same pressure, same chemicals and same schedule everywhere — and one of the two playbooks will be wrong for your home. When you get quotes, ask what they think is on your surfaces and how they’ll treat it. The answer tells you quickly whether they’ve looked at your house or just its square meterage.
Wherever you are — coast side or canopy side — we’ll quote it properly: fixed, written, and specific to what your home is actually fighting.
