There’s no single magic number, but there is a simple answer: oil your deck when it stops repelling water, not when the calendar says so. For most Central Coast decks that lands somewhere around once a year — sooner for areas in full sun, later for shaded spots.
The water test settles it
Forget guessing. Tip a cup of water onto the deck:
- Beads up and sits on top? The finish is still doing its job. Leave it.
- Soaks in and darkens the timber? The oil’s worn through. Time to re-coat.
Do this a few spots around the deck — the sunny northern edge wears faster than the bit under the eaves.
What affects how often
- Sun — UV is what breaks oil down. Full-sun decks need it more often.
- Traffic — the path from the back door to the barbecue wears first.
- Timber — different species drink oil at different rates.
- The Coast — salt air and big summers are hard on a finish.
Don’t oil at the wrong time
Oiling damp timber, or in blazing sun, traps moisture or flashes the oil off before it soaks in. Aim for dry boards, mild weather, and no rain on the way. Autumn and spring are usually the sweet spots here.
Keep on top of it and you’ll dodge the big sand-and-restore job for years. Let it go too long and the timber greys and splits — then you’re back to square one. If yours is already there, we can help.
Thinking about your own deck? See our decking services or get a free quote.