Exterior cleaning on the North Shore

The North Shore is where we’re based and where most of our jobs are. Homes here deal with a particular mix: salt carried in off the Gulf and the harbour, damp winters that suit moss and lichen, and bush gullies that shade walls and fill gutters. This guide explains what that means for your place, then links to our suburb guides. Prices for each job are on the service pages.

Why do North Shore homes need more washing than inland ones?

Salt is the main reason. New Zealand’s building standard for timber framing, NZS 3604, puts everything within 500 m of the coast, harbours included, and within 100 m of tidal estuaries into its highest exposure zone, Zone D, because of the sea salt that settles there. A large share of the Shore sits close to a beach, the Waitematā Harbour or a tidal creek, so salt build-up is part of normal life for many homes here.

Salt matters for two reasons. It dulls glass and paint, and it speeds up corrosion on metal roofing, spouting, fixings and aluminium joinery. A BRANZ factsheet on coastal corrosion notes that the building code’s durability guidance treats regular washing as basic maintenance, especially for anything exposed to wind-driven salt spray.

Whether your own house is inside the 500 m band depends on the street, not the suburb name, so check the distance to the nearest beach, harbour edge or tidal creek rather than assuming. Even then, the zone is confirmed site by site: the standard asks for local conditions and microclimate to be considered, and in MBIE determination 2019/039 the ministry placed a Porirua house beside a sheltered tidal estuary in Zone C, overturning the council’s Zone D call. Treat the distance rule as a likely guide, not a verdict.

Which parts of a coastal house collect the most salt?

The sheltered parts. Rain washes salt off a roof and the open faces of the walls, but it never reaches the soffits under the eaves, the top of the cladding under a deep overhang, the inside of a porch or the frames behind a pergola. BRANZ tested an Auckland building and found those sheltered spots collected roughly three to eight times more salt than exposed surfaces. That is exactly where a hand wash or soft wash does the most good.

Steel cladding makers take this seriously too. BRANZ quotes one large New Zealand manufacturer that asks for unwashed and high-risk areas to be hand washed as often as every three months in the harshest coastal settings, and every six or twelve months elsewhere. If your house has a cladding or roofing warranty, its washing schedule is worth checking. Our house washing page covers how a wash reaches those areas without high pressure.

Why does moss and lichen grow so well on the Shore?

Damp, mild winters are the main driver, and the Shore has plenty of them. NIWA’s climate record for Auckland shows about a third of the year’s rain falling between June and August, and its Albany station logs around 180 rain days a year, nearly twenty a month through winter. Moss and lichen thrive where surfaces stay wet and shaded, so south-facing roof slopes, walls under trees and paths beside bush are the first to go green.

That is a general pattern rather than a rule for every house. A sunny, exposed roof in Takapuna may stay clean for years, while a shaded one in a Birkenhead gully grows lichen in a couple of winters. If yours has started, our roof moss and lichen treatment page explains how it’s cleared without water blasting. You can read more about the region’s weather on NIWA’s Auckland climate page.

What do older North Shore villas and bungalows need?

Gentle methods and a bit of caution. Devonport and Stanley Point, Northcote Point and Birkenhead Point are Special Character Areas in the Auckland Unitary Plan, where most of the character houses date from around 1870 to 1940 and are timber weatherboard with corrugated-iron roofs. Plenty of other Shore homes date from the building boom that followed the Harbour Bridge opening in 1959.

Two safety rules follow from that age. Anything painted before about 1990 should be assumed to carry lead in its paint layers, WorkSafe says, so loose paint is never blasted off into the garden. The regulator also expects most pre-2000 homes to have some asbestos in them, which is why high-pressure water is never used on an older roof or cladding unless it’s known to be asbestos-free. A low-pressure soft wash cleans these homes without either risk. (The Special Character Area overlay is being reviewed through Plan Change 120, so the boundaries may shift.)

What about newer homes in Albany and the northern suburbs?

Newer homes need cleaning just as much, but for different reasons. Much of Albany was built from the 1980s and 1990s onwards, with lifestyle blocks and terraced housing replacing strawberry gardens and dairy farms, and the Hibiscus Coast has grown fast since the motorway was extended. These houses often have plaster or sheet cladding, large areas of aluminium joinery and long runs of spouting.

Painted plaster and sheet claddings mark easily under a high-pressure jet, so they get a soft wash, and many cladding systems set a washing interval as part of their warranty. Aluminium frames and glass near the coast need regular rinsing to keep salt off the seals; our exterior window cleaning page goes into that.

When do North Shore jobs get busy?

Spring and early summer are the peak for house washing, as people get their homes ready for the warmer months and for summer visitors. Gutters get busy in late autumn, before the heavy winter rain, and again after pōhutukawa and other street trees drop flowers and leaves. Winter is a good window for moss and lichen treatments between showers, and the settled weather of late summer suits roof painting.

If you’d like to plan ahead, our North Shore exterior care calendar sets out what to do in each season. Book early in spring if you want a wash before Christmas.

Our North Shore suburb guides

Each guide covers what’s different about one part of the Shore: how close the homes sit to a beach, harbour or tidal creek, how old the housing is and what it’s built from, and how much bush or tree cover is around. Those three things decide how often a place needs washing and which method suits it, so start with the guide nearest you.

• Devonport: Victorian and Edwardian villas, harbour and Gulf beaches on three sides.
• Takapuna: beachfront living with Lake Pupuke just inland.
• Birkenhead: character houses on the Point and kauri bush in the gullies.
• Glenfield: 1960s family homes beside the Kaipātiki Stream reserves.
• Browns Bay: East Coast Bays homes facing the Hauraki Gulf.
• Albany: newer builds, terraces and the Lucas Creek estuary.
• Whangaparaoa: an 11 km peninsula with the Gulf on both sides.

Jobs we quote in North Shore

• House washing in North Shore

  The job most Shore homes book first, especially near the coast where salt builds up under the eaves.

• Roof moss and lichen treatment in North Shore

  For the lichen and moss that take hold on shaded slopes after a few damp winters.

• Gutter cleaning in North Shore

  Clearing leaves and flowers from street trees and bush before the winter rain.

• Water blasting in North Shore

  Concrete driveways, paths, patios and pavers cleaned with a surface cleaner, with the run-off kept out of the stormwater drains.

• Roof painting in North Shore

  Repainting iron, pre-painted steel and concrete-tile roofs: washed, treated, rust spots primed, then two finish coats.

• Window cleaning in North Shore

  Salt film off the glass and frames, outside only.

• Soft washing in North Shore

  Low-pressure cleaning with a mould-killing solution, for painted walls, plaster and roofs that a water blaster would damage.

• Gutter guard installation in North Shore

  Gutters cleaned and checked first, then a guard matched to your trees and roof is measured, fitted and flow-tested by the local crew.

• Roof cleaning in North Shore

  Low-pressure soft washing for iron, concrete tile, clay tile and decramastic roofs, with an asbestos check on older roofs and the wash water kept out of the drains.

• Deck washing in North Shore

  Pine, hardwood and composite decks cleaned with low pressure and a scrub, so the boards come up clean without furring or splintering.

Nearby suburbs

• Devonport
• Takapuna
• Birkenhead
• Glenfield
• Browns Bay
• Albany
• Whangaparaoa