The Sydney exterior maintenance calendar
Sydney exterior care runs on three clocks: thunderstorm season (September to March, per the Bureau of Meteorology), the statutory bushfire danger period (October to March), and the constant harbour salt — which is why BlueScope recommends washing sheltered Colorbond surfaces every three months in coastal areas. Gutters clear before October; solar and windows quarterly near the water; the full wash in spring.
The three clocks every Sydney exterior runs on
Sydney is not a set-and-forget climate. The Bureau of Meteorology puts the thunderstorm season across the warm months from around September to March — the stretch that dumps leaves, tests gutters and throws debris at everything vertical. The statutory bushfire danger period runs October through March, when the NSW Rural Fire Service expects homes near bush to be prepared, gutters included.
The third clock never stops: salt. Anywhere near the harbour or the coast, marine spray settles on glass, panels, render and steel year-round. BlueScope’s maintenance bulletin for Colorbond is explicit that sheltered surfaces in coastal areas should be washed with fresh water at least every three months — double the inland cadence — because salt build-up in unwashed corners is where corrosion starts.
Autumn (March–May): the leaf offensive
Deciduous trees drop through autumn and the first gutter-filling winds arrive with them. This is gutter clean number one of the year: every metre cleared by hand, every downpipe flushed, photographed. It is also the sensible slot for a roof check — lichen and moss that took hold over the humid summer are visible and liftable now.
Windows take their post-summer salt wash, and if the driveway grew its winter slick of mould last year, autumn is when to strip it before the wet, shaded months set it solid.
Winter (June–August): the quiet reset
Winter is Sydney’s maintenance gift: mild, often clear, and the trades are quieter. It is the season for the jobs that need dwell time and dry surfaces — house soft washing, sandstone, fences. The grime of a whole year comes off without competing with the spring rush.
Solar output is lowest in winter, which makes it the cheapest time to have panels off-line for an hour — and a clean array meets the lengthening spring days at full strength.
Spring (September–November): the deadline season
Two deadlines land together. The BOM’s storm season opens around September, and the bushfire danger period starts on the first of October. Gutter clean number two happens before both: clear gutters shed storm water where it should go, and per the NSW RFS checklist, leaf-free gutters remove the fuel tray embers land in. CSIRO research ties at least 85% of bushfire home losses to ember attack, not flame — the gutter clean is genuinely a bushfire preparation.
Spring is also when the whole street books the full exterior refresh before summer entertaining, which is why it books out fastest. The homes on a plan are already scheduled; everyone else queues.
Summer (December–February): watch and rinse
Summer is storm-response season. After any big blow: eyeball the gutters, check the downpipes ran clear, and rinse the salt film off glass and panels — summer sea breezes load coastal glass faster than any other season. Quarterly solar cleans matter most now because summer is when soiling costs the most yield; the US National Renewable Energy Laboratory puts typical soiling losses at about 5% of output, and summer is where that percentage hurts.
Then the cycle turns. The point of a calendar — and of the Schmick Plan, which simply runs this calendar for you — is that none of these jobs is big if none of them is ever skipped.