Deck Cleaning Services

Professional deck cleaning removes built-up dirt, mould, mildew, algae, tannin stains, and greyness from timber and composite deck surfaces. We use a controlled low-pressure soft wash technique combined with specialist deck cleaning solutions that lift contaminants from the timber grain without raising the fibres or damaging the surface. The result is a clean, refreshed deck that is ready for oiling, staining, or simply enjoying again.

New Zealand's climate is tough on outdoor timber. From Auckland's humid summers to Wellington's wet winters and Christchurch's cold frosts, decks across the country are constantly exposed to moisture, UV, and biological growth. Without regular cleaning, mould and algae make decks slippery and dangerous, while UV damage and moisture penetration cause the timber to grey, crack, and deteriorate prematurely. Regular cleaning and maintenance is the most cost-effective way to protect your investment and extend the life of your deck.

Timber decks should never be cleaned with high-pressure water blasting. The force can raise the grain, splinter the timber, drive moisture deep into the wood, and strip existing coatings. We use a low-pressure soft wash technique that is gentle on the timber while still removing contaminants effectively. For composite decking, pressure settings are adjusted accordingly as composites are generally more tolerant of higher pressure than natural timber.

We clean all common deck types found in New Zealand homes including pine, kwila, hardwood, macrocarpa, cedar, and composite decking. Each timber type has different characteristics and responds differently to cleaning solutions and pressure, which is why our team assesses the deck surface before starting and tailors the approach accordingly. We also clean stairs, balustrades, and pergola structures as part of a full deck clean where required.

Yes, and a freshly cleaned deck is the ideal time to do it. Oiling after cleaning restores moisture to the timber, protects against UV damage and water penetration, and dramatically slows the return of mould and greying. Oil applied to a dirty deck sits on top of the contaminants rather than penetrating the timber, so cleaning first is essential for the oil to bond properly and last as long as possible. We can advise on suitable oil products for your specific timber type.

Most New Zealand decks benefit from a professional clean once a year, ideally in spring before the outdoor entertaining season begins. Decks in shaded areas, near trees, or in high-humidity regions may need attention more frequently as mould and algae establish faster. If your deck is starting to look grey, feels slippery when wet, or has visible mould growth, it is time for a clean regardless of when you last had it done.

Yes. Our specialist deck cleaning solutions are formulated to target black mould, mildew, algae, and tannin staining that cause the dark discolouration common on older timber decks. Results depend on the severity and age of the staining and the condition of the timber, but in most cases we can achieve a significant improvement. We will give you an honest assessment of what to expect during your quote rather than overpromising.

Most residential deck cleans take between one and three hours depending on the size and condition of the deck. After cleaning, the deck needs to dry fully before oiling or staining, which typically takes 24 to 48 hours depending on the weather. We will give you a clear timeframe when we provide your quote so you can plan around it.

Yes. We use eco-friendly, biodegradable cleaning solutions and take precautions to protect surrounding plants and gardens during the clean. We pre-wet any nearby vegetation before applying cleaning solutions and rinse thoroughly afterward. If you have particularly sensitive plants or vegetable gardens close to the deck, let us know when you book and we will take extra care around those areas.

Pricing depends on the size of the deck, the timber type, the level of soiling, and whether oiling is included. We provide transparent, obligation-free quotes upfront so there are no surprises. We service properties across Auckland, Hamilton, Tauranga, Palmerston North, Wellington, Christchurch, and Queenstown. Get in touch for a free assessment and an accurate price for your specific deck.