Deck maintenance
Deck maintenance, sanding and repairs in the Northern Rivers
Most decks in this region need re-oiling every 12 months, and coastal decks need it every 6 to 9 months. Homesmith sands, oils, replaces boards and checks the structure underneath. You get a fixed price before any work starts.
Why decks fail faster up here
The subtropical Northern Rivers climate is harder on timber than almost anywhere else in the country. Four things do the damage, and they compound.
High UV
Ultraviolet light breaks down the lignin that binds timber fibres together. The surface goes grey, the grain lifts, and oil that is not topped up burns off the exposed face first. North and west facing boards always fail before the shaded side of the same deck.
High humidity
Timber here swells and shrinks constantly because the moisture content of the air rarely settles. That movement works fixings loose, opens up end grain and pushes boards into cupping. Mould also colonises damp shaded boards within a season.
Heavy summer rain
Long downpours drive water into board ends, screw holes and the gap where the deck meets the house. Water that cannot drain away sits in those joints and starts rot from the inside. Poor fall and blocked gaps under the boards make it worse.
Salt exposure
Anything near the coast at Byron Bay, Suffolk Park, Lennox Head or Ballina carries a salt load in the air. Salt is what kills the fixings: standard galvanised screws and nails corrode, stain the timber black around the head, and eventually lose their grip. Stainless fixings are not optional within sight of the water.
How each timber behaves here
Merbau
Merbau is dense and durable, but it bleeds tannin heavily for the first year and stains anything below it. It holds oil well once sealed, though the surface goes silver quickly if a coat is skipped. Pre-drilling matters because the density splits board ends near fixings.
Spotted gum
Spotted gum is hard and long lasting, and it takes oil beautifully when the surface is properly sanded. It is prone to surface checking under strong UV, which shows as fine hairline cracks along the grain. Regular oiling slows that down more than any other treatment.
Treated pine
Treated pine is softer and moves more than the hardwoods, so cupping and raised grain show up sooner. The treatment protects against rot and termites, not against UV or water sitting on the surface. It needs oiling more often, not less.
Signs your deck needs attention
You can run this check in five minutes. Walk the whole deck, including the shaded end and the section closest to the house.
Surface has gone grey
CosmeticThe oil has worn off and UV is breaking down the top layer of fibres. Cosmetic at this stage, but it will not stay that way.
Water no longer beads
CosmeticTip a cup of water on the boards. If it soaks straight in instead of sitting up in beads, the finish is gone and the timber is drinking rain.
Splinters and lifting grain
CosmeticThe surface fibres have separated and are standing up. Cosmetic and a safety nuisance for bare feet, fixed by sanding.
Cupping or crowning boards
BothBoards curling up at the edges or humping in the middle mean uneven moisture between the top and underside. Usually cosmetic, but it points to poor ventilation or drainage below.
Black mould in shaded sections
BothMould grows where the deck stays damp and the sun never reaches. Cosmetic on the surface, though persistent damp in the same spot is worth checking underneath.
Rusted or proud fixings
StructuralScrews standing above the surface or ringed with rust stain have lost their hold or are corroding away. Structural, because a fixing that has failed is no longer holding the board down.
A board that flexes underfoot
StructuralAny bounce or softness when you step means the board or the joist below it has lost strength. Structural, and a reason to keep off that section until it is inspected.
What we check that most people do not
The surface is the easy part. A deck that looks fine on top can be unsafe underneath, so every maintenance job starts with a look below the boards.
Joists and bearers
We probe the joists and bearers for soft timber, paying most attention to the point where a joist lands on a post or bearer. Water tracks into that junction and sits there, so rot starts in the joint long before it shows on the face.
Ledger board fixings
The ledger is the timber bolting the deck to the house. We check the bolts, the spacing, the corrosion and whether the flashing behind it has been done. This is the single most common serious deck failure in Australia.
Post bases
Posts sitting directly in damp soil or buried in garden bed mulch will rot at ground level while the top of the post looks perfect. We check each base and look for stirrups that hold the post clear of the ground.
Bearer spans
We sight along the bearers for sag. A span that has dropped means the bearer is undersized, the footing has moved, or the timber has weakened. Sag gets worse, it does not settle.
The ledger connection is the single most common serious deck failure. If the deck attaches to your house and you have never had the ledger checked, start there.
Deck looking tired? We will quote a fixed price to bring it back.
Deck sanding, oiling, board replacement and structural checks across Byron Bay, Suffolk Park, Bangalow, Mullumbimby, Ocean Shores, Lennox Head, Ballina, Alstonville and Lismore.
Sanding and oiling, what actually happens
- 1
Clean and strip
The deck is cleaned back to bare timber, removing dirt, mould and any failed coating. Old film finishes have to come off completely.
- 2
Punch and replace fixings
Proud screws and nails are punched down or replaced. Corroded fixings come out and are swapped for stainless where salt is a factor.
- 3
Sand
The boards are sanded to remove grey fibre, splinters and raised grain, and to open the timber so it will take oil evenly.
- 4
Remove dust
All sanding dust is cleared from the surface and out of the board gaps. Dust left behind stops the oil bonding to the timber.
- 5
Oil in thin coats
Oil goes on in thin, even coats rather than one heavy one. Thick coats sit on the surface, stay tacky and peel.
- 6
Drying window
Coats are timed around the weather and the humidity. Keep off the deck for 24 to 48 hours, and keep furniture off for at least 72 hours.
Oiling over a dirty or damp deck is the most common reason a finish fails within months. The oil cannot reach the timber, so it sits on top of the grime and lifts off.
Repair or replace
Worth repairing
Individual rotted, split or cupped boards can be replaced and blended in. Grey, splintered surfaces sand back. Corroded fixings come out and get swapped. Localised rot in one joist can usually be cut out and sistered.
Past repairing
Widespread rot through the framing cannot be economically patched. Once bearers, multiple joists or the posts are gone, replacing boards on top only hides the problem. At that point maintenance is not the answer.
A full rebuild is not a service Homesmith offers. We maintain and repair existing decks. If your deck needs replacing, we will tell you straight so you can get a licensed builder in rather than spend money on a finish that will not last.
What deck maintenance costs
Deck maintenance is quoted on two things: the size of the deck in square metres, and the condition it is in when we look at it. A deck that has been oiled every year takes a fraction of the time of one that has been left for a decade. Board replacement, fixing replacement and any framing repairs are itemised separately so you can see what you are paying for.
You get a fixed price in writing before any work starts. The number we quote is the number you pay.
Pricing placeholder
Homesmith to insert real pricing here, for example a per square metre rate for sand and oil, a minimum call out, and a rate for board replacement.
Common questions
Most decks in this region need re-oiling every 12 months, and decks within a few streets of the coast need it every 6 to 9 months. UV is the main driver, salt air and humidity accelerate it. A deck that no longer beads water is already overdue.
Deck looking tired? We will quote a fixed price to bring it back.
Deck sanding, oiling, board replacement and structural checks across Byron Bay, Suffolk Park, Bangalow, Mullumbimby, Ocean Shores, Lennox Head, Ballina, Alstonville and Lismore.