Decks are made for enjoying Wellington’s stunning views — but they don’t stay beautiful on their own. Thanks to constant wind, rain, and shade from native bush, decks across the region become slippery, mossy, and discoloured within months if not maintained.

At Metro Water Blasting, we offer professional deck cleaning services in Wellington. Whether you have a hardwood entertainment area in Karori, a composite pool deck in Island Bay, or a shaded timber platform in Wilton, we safely restore your deck to its natural beauty without damaging the surface.

👉 Book now: Deck Cleaning Wellington

Why Decks in Wellington Need Regular Cleaning

Wellington’s climate and geography do no favours for exterior wood:

  • High humidity and rain → damp, slippery surfaces
  • Coastal salt air → causes discolouration and surface decay
  • Shaded bush zones → promote moss, lichen, and black mould
  • Frequent wind → blows dust, leaves, and pollen onto surfaces
  • UV exposure → fades timber and wears down protective coatings

These elements create decks that look tired, feel dangerous, and deteriorate faster than they should — especially in suburbs like Aro Valley, Lyall Bay, and Khandallah.

Suburb-Specific Deck Conditions

✅ Karori & Wilton

Bush-heavy and shaded — decks here build up moss and algae fast. Slippery timber is a hazard in winter. We use soft pressure and pre-treatment to restore grip and colour.

✅ Island Bay & Lyall Bay

Coastal exposure adds salt spray and intense wind. Composite decks here often look faded and gritty. We use appropriate cleaners that revive surface tones.

✅ Khandallah & Ngaio

Older hardwood decks, often surrounded by trees. We clear organic buildup and restore grain without gouging the timber.

✅ Newtown & Mount Cook

Urban decks near apartment blocks get polluted with airborne grime and mould. Perfect candidates for deep restoration every 12 months.

✅ Brooklyn & Aro Valley

Decks on hillsides or tight backyards are often shaded and stay damp. We remove black biofilm and help prevent re-growth.

👉 Related read: Spring Home Maintenance in Wellington

What Surfaces We Clean

We service all common decking types in Wellington:

  • Pine decking (treated timber)
  • Hardwood decks (kwila, vitex, purpleheart, etc.)
  • Composite decks (EcoDeck, Futurewood, Modwood, etc.)
  • Painted or stained timber
  • Pool surrounds and spa platforms
  • Multi-level or split-level decks

We never use harsh high pressure on wood. Instead, we apply gentle chemical treatments and soft wash or low-pressure rinsing, preserving your finish while removing:

  • Moss, algae, and mould
  • Leaf and pollen stains
  • Bird droppings
  • Salt residue
  • UV-faded surface grime

👉 Learn more: Deck Cleaning Wellington

Before & After: Real Results

✅ Wilton – A pine deck turned dangerously slick with algae. We pre-treated the surface, soft-washed, and restored full traction without damaging the boards.

✅ Island Bay – Composite deck looked dull and faded. We cleaned without abrasives, bringing out original tones and removing grime buildup.

✅ Karori – Hardwood kwila deck blackened from rain and leaves. We removed surface buildup and advised sealing options to prolong the clean.

👉 Bonus blog: Island Bay Driveway Cleaning – Before & After
👉 Also see: Gutter Cleaning Checklist for Wellington

Why Not DIY?

  • Store-bought pressure washers are too aggressive for timber
  • Incorrect cleaning chemicals can bleach or strip colour
  • Decks can become patchy, streaked, or even gouged
  • Risk of damaging nearby surfaces or plants
  • DIY often misses edge mould or between-board moss

We bring pro-grade soft washing equipment, the correct pre-treatment mix, and years of experience — delivering consistent results without risk.

Add-On Services That Pair Well

Many clients combine deck cleaning with:

FAQs About Deck Cleaning in Wellington

Q: Will the cleaning damage my timber?
No. We assess your deck’s age, timber type, and finish before choosing a low-pressure or soft wash method.

Q: What if my deck is painted or stained?
We clean to preserve existing finishes. If the paint is flaking, we can prepare it for re-staining with a pre-clean.

Q: How often should I clean my deck?
Every 12–18 months is typical in Wellington — more frequently for shaded or coastal homes.

Q: Do you apply sealant or oil after?
We don’t apply coatings directly but can advise what will suit your surface once clean.

Book Your Deck Clean in Wellington Today

Don’t let your deck become slippery, stained, or uninviting. Our local Wellington team can safely clean, restore, and refresh your deck — whether it’s timber, composite, or concrete — with proven results and no mess left behind.

📍 Based in Wellington
📞 Call 0800 997 997 – Open 24/7
📅 Free quotes online: Deck Cleaning Wellington

Request A Quote