A timber deck takes more weather than almost anything else around a home. Sun dries the surface, rain gets into the gaps, and every barbecue and pot plant leaves a mark. Regular care is what keeps a deck looking good between full restorations, and it costs far less. This guide covers how often to recoat, how to clean a deck, and how to tell when it needs more than maintenance.
How often should a deck be recoated?
There is no single answer, because it depends on the deck. Deck builder Softwoods, which uses Intergrain finishes, lists the factors that decide it: the climate, how exposed the deck is to sun and rain, how much use it gets, whether it is near a pool or sand, and the type of timber.
A north-facing deck with no roof will need recoating far more often than one under a pergola. Rather than going by the calendar, watch the deck itself. Cabot’s says the signs it is time to recoat are cracking, splitting, greying, or water no longer beading on the surface.
What are the early signs a deck finish is wearing?
The edges and the hardest-working areas go first. Cabot’s product information for its Aquadeck decking oil says the first signs are patchiness or discolouration on the edges of boards, often where not enough product was applied, along with wear on the hard grain and a loss of water repellency.
A simple check is to splash some water on the busiest part of the deck. If it beads, the finish is still working. If it soaks straight in, it is time to plan a recoat.
What is the difference between cleaning, a maintenance coat and a recoat?
They do different jobs, and only a recoat protects the timber. Cleaning removes dirt, leaves and mould. A maintenance coat refreshes the colour. A recoat with a decking oil puts protection back into the timber.
Cabot’s is clear on this: its EasyDeck maintenance coat does not protect your timber, and is designed to be used between recoats with a water-based decking oil such as Cabot’s Aquadeck. A maintenance coat can make a deck look better, but it is not a substitute for recoating.
How should you clean a timber deck?
Sweep it regularly and wash it a few times a year. Leaves and dirt left sitting on boards hold moisture against the timber, which encourages mould and staining, so keeping the surface clear is the easiest maintenance there is.
Use a cleaner made for timber decks, and follow the label. Cabot’s makes a deck wash designed to remove dirt, dust and bird droppings for everyday cleaning. Let the deck dry fully before any oil goes on.
Can you put new oil over the old finish?
Often, yes, as long as the old coating is sound. Cabot’s says its Aquadeck water-based decking oil can be used over existing oil-based or water-based coatings, but every product is different, so always check the label for the one you are using.
If the old finish is peeling, flaking or very patchy, putting more oil on top won’t fix it. That is when a deck needs stripping or sanding back before it is recoated.
When is it time for a full restoration?
When maintenance no longer brings the deck back. A deck that has gone grey right through, has a coating that is failing in patches, or has rough, split or soft boards needs more than a clean and a coat.
A full restoration means checking the boards and fixings, cleaning, sanding back failing coatings, and then recoating. Our deck restoration service explains how that works, and our page on decks and outdoor timber in Ringwood covers decks in the outer east.
A simple year of deck care in Melbourne
- Spring: wash the deck after winter and check for greying, patchy edges and water soaking in.
- Summer: sweep regularly, clean up spills, and keep pot plants on feet so water can drain.
- Autumn: clear leaves often, and recoat in dry weather if the deck needs it, before the wet months.
- Winter: keep the surface clear of leaves and debris so it dries out between showers.
Frequently asked questions
Does a deck maintenance coat replace recoating?
No. Cabot’s says its EasyDeck maintenance coat does not protect the timber. It restores the look between recoats, and the deck still needs a proper decking oil when the signs of wear appear.
Can new decking oil go over the old one?
Often, yes, if the old coating is sound. Cabot’s says its Aquadeck water-based decking oil can be used over existing oil-based or water-based coatings, but always check the label for the product you are using.
When does a deck need restoring rather than recoating?
When cleaning and a fresh coat won’t fix it: a deck that has gone grey right through, has a coating that is peeling or patchy, or has rough, split or soft boards usually needs a full restoration.
If your deck needs more than a clean, Steve can come and have a look. Call 0419 581 575 for a free written quote.