Wellington’s famously wild weather — from salt-laden coastal winds to heavy rain and strong UV radiation — creates some of the toughest conditions for roofs anywhere in New Zealand.
Homeowners who neglect regular roof maintenance often face massive repair bills — or premature roof replacements costing tens of thousands.
At Metro Water Blasting, we specialize in professional roof cleaning Wellington services that protect your investment and keep your home safe.
Let’s dive into why regular roof cleaning isn’t optional — it’s essential for every Wellington property.
Book your Wellington roof cleaning service today with Metro Water Blasting.
How Wellington’s Climate Threatens Your Roof
| Weather Factor | Impact on Roofs |
|---|---|
| Salt Spray | Corrodes metal roofs, weakens coatings |
| Heavy Rain | Promotes moss and algae growth |
| High Winds | Dump debris into valleys and gutters |
| UV Exposure | Fades, cracks, and dries roofing materials |
Over time, these environmental forces break down roofing materials, trap moisture, and open pathways for leaks.
✅ Annual or biannual roof washing is critical to defend against this.
Top Roof Problems Caused by Poor Maintenance
1. Moss and Lichen Infestation
Wellington’s rain and humidity make moss, lichen, and algae thrive.
Damage caused:
- Roots penetrate tiles and membranes
- Water retention accelerates decay
- Heavy moss mats dislodge tiles in storms
2. Salt Corrosion
Homes near the coast (like Island Bay, Seatoun, Lyall Bay) experience constant salt exposure.
Damage caused:
- Rust patches on iron and Colorsteel roofs
- Weakening of protective paint layers
- Accelerated degradation of flashings and fasteners
3. Blocked Roof Valleys and Gutters
High winds dump:
- Leaves
- Twigs
- Sand
- Roofing grit
into valleys and gutters, leading to water backups and roof leaks.
4. UV Damage
Relentless sunlight dries out:
- Paints
- Membranes
- Rubber flashings
causing cracks that invite water intrusion.
✅ Regular soft washing preserves protective coatings and identifies early cracking.
Why DIY Roof Cleaning Isn’t Safe or Effective
| Risk | Why It’s Dangerous |
|---|---|
| High-Pressure Blasting | Damages tiles, strips paint |
| Chemical Misuse | Harms gardens, pets, and roofing |
| Unsafe Ladder Work | Falls and serious injuries common |
✅ Metro Water Blasting uses professional soft washing methods that:
- Gently remove moss, salt, and grime
- Protect all roofing materials
- Use eco-safe treatments
✅ Safety first — professional cleaning avoids expensive mistakes.
How Regular Roof Cleaning Saves You Money
| Regular Cleaning | Skipped Cleaning |
|---|---|
| $400–$900/year (depending on roof size) | $15,000–$40,000+ for early roof replacement |
| Minor moss control | Major moss infestations, structural rot |
| Small leak repairs early | Full ceiling and insulation replacements |
✅ Preventative maintenance costs 90% less than major roof repairs or replacements.
Best Times to Clean Your Roof in Wellington
- After winter storms (July–August): remove moss and debris buildup.
- Before spring and summer UV peaks (October–November): protect against drying and cracking.
- After major storms or cyclones: immediate post-storm inspections are critical.
✅ Schedule your annual Wellington roof cleaning now.
Why Soft Washing is the Best Roof Cleaning Method
Soft washing combines:
- Low-pressure water systems
- Eco-friendly moss and algae treatments
- Gentle rinsing that protects roofing materials
vs. High-pressure blasting which can:
- Break tiles
- Strip membrane coatings
- Void roofing warranties
✅ Metro Water Blasting uses only safe, professional soft washing to clean Wellington roofs.
What Happens During a Metro Water Blasting Roof Clean?
- Full Inspection: Identify moss, debris, and potential damage.
- Application of Eco-Treatments: Kill moss and spores deep at the roots.
- Gentle Soft Wash Rinse: Lift dirt, algae, salt, and moss residues.
- Drainage Flushing: Clear valleys, gutters, and downpipes.
- Post-Clean Inspection: Check for maintenance issues needing attention.
✅ Full peace of mind for Wellington homeowners!
FAQs About Roof Cleaning in Wellington
How Often Should I Clean My Roof in Wellington?
- Coastal homes (e.g., Seatoun, Island Bay): Every 6–12 months
- Inland homes (e.g., Karori, Khandallah): Every 12–18 months
Will Roof Cleaning Remove All Moss and Lichen?
Yes — our treatments kill moss to the root system and prevent regrowth for 12–24 months.
Is Roof Cleaning Safe for My Garden and Pets?
Absolutely. We use fully biodegradable, eco-friendly treatments that are safe once dry.
Protect Your Home — Book Your Wellington Roof Cleaning Today!
Wellington’s extreme weather won’t wait — and neither should you.
Protect your roof, extend its lifespan, and avoid costly repairs by booking professional roof cleaning Wellington services with Metro Water Blasting.
Schedule your roof clean now or call 0800 997 997 for a free quote!