Melbourne's climate is tough on timber. Hot dry summers, cold wet winters and everything in between mean that outdoor timber decks take a real beating year-round. If your deck is looking rough, the question most homeowners face is: am I better off repairing it or starting fresh?
Here's a practical guide to help you work that out — based on what we see on decks across Epping and northern Melbourne every week.
Signs your deck can be repaired
These are the situations where repair is the right call — and often far cheaper than replacement:
Surface-level weathering and greying
Timber that has greyed, lost its colour and looks tired is often still structurally sound. A sand and re-oil or re-coat brings it back dramatically. This is the most common deck job we do — the timber underneath is fine, it just needs surface treatment and protection.
A few damaged or rotted boards
Isolated board rot — typically at the ends, near drainage points or anywhere water pools — doesn't mean the whole deck needs replacing. Replacing individual boards is straightforward as long as the frame underneath is solid.
Loose or protruding fixings
Screws and nails work loose over time. This is a maintenance issue, not a structural one — re-fixing or counter-sinking and filling the boards restores a flat, safe surface.
Railings and balustrades that need attention
Handrails that wobble or balustrades with broken spindles are safety issues but rarely signal a full replacement is needed. In most cases, the railing can be repaired or replaced independently without touching the main deck structure.
Signs your deck needs replacing
These are the indicators that repair won't give you a long-term outcome — and that the money is better spent on a rebuild:
Soft, spongy or bouncy boards throughout
If large areas of decking feel soft underfoot or bounce when you walk on them, the issue is likely widespread rot in the joists or bearers underneath — not just the surface boards. Replacing surface boards over a rotten frame is a false economy.
Rotted structural posts or bearers
This is the key inspection. Posts that are soft, crumbly or have rot at the base, or bearers with significant decay, mean the deck's structure is compromised. This is a safety issue and signals a rebuild is needed.
More than 30–40% of boards need replacing
There's a rough tipping point: if you're replacing more than a third of the deck boards plus doing structural work, the cost starts to approach a full rebuild — at which point you get a better result by starting fresh with new, treated timber and modern fixings.
The frame is undersized or non-compliant
Older decks — particularly those built before the 1990s — were often built to standards that don't meet current requirements. If you're doing significant work on a non-compliant deck, it's worth assessing whether a full rebuild that meets current standards is the smarter long-term investment.
How to check your deck yourself
Before calling anyone, do a quick walk-through:
- Walk every board — feel for soft spots, bounce or movement underfoot
- Check beneath the deck — look at posts, bearers and joists for visible rot, sagging or pest damage
- Push on the posts — they should be completely solid with no give at the base
- Look at the ledger — the board where the deck connects to the house is a common failure point for rot
- Check end-grain on boards — end-grain absorbs water easily and is often where rot starts
What it typically costs
Broadly speaking, for a standard 20–30m² Melbourne suburban deck:
- Sand and re-oil / re-coat: $400–$900 depending on size and timber condition
- Replace a few boards: $150–$400 including materials
- Partial repair (boards + some structural work): $600–$2,000+
- Full rebuild: $4,000–$12,000+ depending on size, height, materials and access
These are rough guides — every deck is different. We're always happy to come out and give you an honest assessment before you spend money on anything.
The most common mistake
We see homeowners spend money on surface repairs — sanding, oiling, replacing boards — on decks with compromised frames. It looks better for a season, then the problems return and they've spent money that didn't address the real issue. If you're not sure about the frame, get it checked before you spend anything on the surface.