Wellington’s iconic winds, coastal air, and damp winters make roof maintenance more than just a once-in-a-while task — it’s an essential part of home care. Whether you live in the heritage suburbs of Thorndon and Mount Victoria, or the high-moisture, shaded streets of Khandallah or Karori, your roof is constantly exposed to the elements.

At Metro Water Blasting, we provide safe, effective, and affordable roof cleaning services across Wellington, removing moss, mould, lichen, and built-up grime before they turn into costly problems.

👉 Learn more: Roof Cleaning Wellington – Metro Water Blasting

Why Roof Cleaning Matters in Wellington’s Climate

Wellington’s intense weather fluctuations — from heavy rain to salty sea spray — accelerate roof damage faster than in most parts of New Zealand. If left uncleaned, your roof can:

  • Become a breeding ground for lichen and moss
  • Suffer structural degradation from blocked gutters and moisture penetration
  • Develop stains and discolouration
  • Lead to water pooling and leaks, particularly on low-pitch roofs

Suburbs like Breaker Bay, Lyall Bay, and Island Bay experience extra wear due to salt exposure, while Ngaio, Wilton, and Brooklyn deal with damp and shaded conditions that favour moss growth.

Suburbs We Frequently Service for Roof Cleaning

We clean hundreds of roofs across Wellington each year. These are the most common areas we service — and why they need it:

1. Karori & Khandallah

Shaded bush areas with older homes and limited sun exposure — perfect conditions for black mould, lichen, and thick moss.

2. Seatoun, Breaker Bay & Lyall Bay

Salt-heavy sea spray from the Cook Strait accelerates rust on metal roofing and embeds grime on tiles.

3. Thorndon, Mount Victoria & Aro Valley

These suburbs feature older homes with fragile roofing materials — we use a gentle roof treatment system to clean safely.

4. Johnsonville, Churton Park & Tawa

Newer builds with tile or metal roofs benefit from proactive cleaning to extend lifespan and avoid early maintenance costs.

5. Newtown, Berhampore & Hataitai

Trees and older gutters lead to blocked downpipes and water retention — our roof cleaning often includes a gutter check and optional clean.

Our Roof Cleaning Process: Safe for All Roof Types

At Metro Water Blasting, we follow a careful, proven process for roof cleaning in Wellington:

  1. Roof Inspection: Assess moss, mould, and lichen coverage
  2. Moss & Lichen Treatment: Application of a commercial-grade, biodegradable chemical
  3. Soft Wash or Rinse (if requested): For heavily stained or debris-covered roofs
  4. Optional Gutter Clean Add-On – Highly recommended for full protection
    👉 Gutter Cleaning Wellington Services

We don’t blast roofs at high pressure, which can damage tiles or lift shingles. Instead, we use a long-term moss treatment that works over weeks to kill biological growth at the root — so it won’t grow back quickly.

How Often Should You Clean Your Roof in Wellington?

The ideal schedule for Wellington homes is:

  • Every 12–18 months in moderate climates (e.g. Kelburn, Northland)
  • Every 9–12 months in coastal, shaded, or high-growth areas like Brooklyn or Karori
  • Before repainting or selling to increase street appeal and home value

Regular cleaning prevents long-term decay and avoids costly repairs or early replacement.

Before & After: Real Roof Results in Wellington

We recently treated a corrugated iron roof in Wilton that was covered in green-black moss and algae. Over the next four weeks, the growth gradually died off, revealing a clean, bright surface — all without high-pressure washing.

In Miramar, a tiled roof was so heavily coated with lichen that water couldn’t run off properly. Our team treated the surface, followed up with a gutter clean, and restored full drainage.

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Roof Cleaning FAQs

Q: Will roof treatment damage my plants or pets?
No — our treatment is biodegradable. We rinse nearby gardens and advise you to keep pets inside until the product has dried (usually 2–4 hours).

Q: How long does it take to see results?
You’ll begin seeing moss and lichen die within 2–4 weeks. Full roof clearance typically occurs over 4–12 weeks, depending on sun and rainfall.

Q: Do you offer bundled cleaning services?
Yes. We frequently bundle roof cleaning with:

This is especially popular with homes in Ngaio, Kelburn, and Seatoun, where all surfaces tend to gather grime quickly.

The Hidden Risk of Moss & Lichen

Besides looking unsightly, moss and lichen trap moisture — which accelerates decay. They create small root systems that grow into your roofing material, weakening tiles, lifting seams, and blocking drainage systems.

Removing these invaders early through roof treatment is one of the most cost-effective home maintenance tasks you can do.

Book Roof Cleaning in Wellington Today

If your roof is discoloured, covered in growth, or looks patchy from the street — don’t wait. Metro Water Blasting offers professional roof cleaning throughout Wellington, with tailored service for your home and suburb conditions.

📍 Based in Wellington
📞 Call 0800 997 997 — Available 24/7
📅 Get a free quote: Roof Cleaning Wellington

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