Wellington’s northern suburbs are known for their family-friendly communities, elevated views, and leafy green streets. But if you live in Johnsonville, Newlands, Khandallah, Paparangi, or Ngaio, you already know how quickly your home’s exterior can start to look tired — covered in grime, mould, or streaks from Wellington’s famous weather.

In these suburbs, wind, bush, moisture, and salt air work together to wear down your property’s exterior. That’s why regular house washing isn’t just a cosmetic upgrade — it’s vital maintenance.

At Metro Water Blasting, we offer professional house washing services across Wellington’s northern suburbs, using soft wash techniques tailored to your home’s materials, slope, and environment. Whether you’re prepping your home for sale, maintaining it for the long haul, or just want it to look its best — we’re your go-to local team.

👉 Learn more about our services: House Wash Wellington

Why Northern Wellington Homes Need Regular House Washing

While northern Wellington gets slightly less salt spray than coastal areas, the region is still hit with:

  • High wind exposure
  • Moisture-retaining vegetation
  • Shaded homes near bush or gullies
  • Tree pollen and leaf debris
  • Urban air pollutants from road traffic

These conditions lead to:

  • Black mould and green algae forming on weatherboards
  • Staining under eaves, around windows, and along baseboards
  • Spiderwebs, dust, and dirt stuck to cladding and trims
  • Paint deterioration and rot if left untreated

Homes in Ngaio and Khandallah, surrounded by native bush, often face faster bio-growth buildup. Properties in Newlands and Paparangi, while newer, suffer from wind-driven dust and airborne grime from nearby arterial roads.

Suburb-by-Suburb Breakdown: Common Exterior Issues

✅ Johnsonville

Wellington’s northern hub. Many homes here are exposed on open slopes and see a lot of dust, grime, and mildew on lower levels due to stormwater runoff and street-level splashback.

✅ Newlands

Often sunny, but wind tunnels and close proximity to bushy reserves means fast buildup of dust and pollen. South-facing homes here grow algae and lichen fast.

✅ Khandallah

Character homes and steep terrain. Due to shade and dampness, Khandallah homes often grow thick moss on lower boards, with roof grime trickling onto siding.

✅ Paparangi & Grenada Village

Mostly newer homes with painted cladding and exposed concrete bases. These properties tend to develop long streaks and oxidized grime — perfect for soft washing.

✅ Ngaio

Bush-clad suburb with a high risk of moss, mildew, and spiderweb accumulation. Also prone to wet baseboards and rear walls due to sloped sections.

What We Clean — Full Exterior House Washing Package

When you book with Metro Water Blasting, your house wash includes:

  • Full exterior soft wash of cladding, weatherboards, or painted surfaces
  • Eaves, gutters (exterior only), fascia boards, and soffits
  • Windows and frames, including water spotting removal
  • Downpipes and exterior doors
  • Baseboards and foundation lines, where grime builds up fastest

We clean all exterior surface types including:

  • Timber weatherboards
  • Plaster and textured coatings (monolithic)
  • Brick and concrete cladding
  • Painted fibre cement
  • Modern composite and PVC materials

We adjust pressure and detergents based on your home’s materials and environmental exposure.

👉 See our soft wash method: House Washing Wellington

Real Results from Northern Suburbs

We recently cleaned a classic 1950s weatherboard home in Khandallah with heavy algae buildup on its southern walls. Using our soft wash detergent and gentle rinsing method, we removed years of grime in just a few hours — revealing vibrant paint underneath.

In Johnsonville, a customer preparing their home for sale had dull paint covered in pollen, dust, and cobwebs. Our house wash and exterior window clean made the property shine, increasing its buyer appeal and listing photos dramatically.

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Why We Use Soft Washing, Not High Pressure

High-pressure water blasting can damage paint, force water behind weatherboards, and shorten your cladding’s lifespan. That’s why we use low-pressure soft washing, which:

  • Lifts mould, lichen, and mildew gently
  • Doesn’t damage fragile or painted surfaces
  • Uses biodegradable detergents that kill growth at the root
  • Leaves your home cleaner for longer

Soft washing is perfect for homes in Ngaio, Thorndon, and other older Wellington suburbs with painted weatherboards and heritage features.

How Often Should You Wash Your House?

We recommend:

  • Every 12 months for homes in shaded or exposed areas like Khandallah, Ngaio, and Karori
  • Every 18 months for sunnier, newer homes in Grenada Village or Newlands
  • Before repainting or selling to extend paint life and boost curb appeal

Mould and grime not only look bad — they break down paint and can lead to expensive repairs.

Add-On Services for a Full Exterior Refresh

Want to go beyond just a house wash? We offer bundled exterior cleaning services, including:

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FAQs About House Washing in Northern Wellington

Q: Will your wash damage my paint?
No. Our soft wash system is designed for delicate surfaces and painted cladding. We avoid harsh pressure and test every home first.

Q: Can I bundle in a roof or deck clean?
Absolutely. Many customers in Johnsonville or Paparangi bundle roof treatments or fence cleaning for full property refresh.

Q: Do you offer annual maintenance plans?
Yes — ask us about scheduled house washes for 12 or 18-month intervals. Perfect for homeowners and property managers.

Book Your Northern Wellington House Wash Today

Whether you’re in Johnsonville, Newlands, Khandallah, or anywhere in Wellington North, Metro Water Blasting is ready to help you restore your home’s true beauty.

📍 Based in Wellington
📞 Call 0800 997 997 – Available 24/7
📅 Get a free quote via our Wellington House Washing Page

 

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