How Long Does a Timber Fence Last? 15 to 20+ Years (Melbourne)

Typical lifespans by fence type

Fence type	Typical Melbourne lifespan	What usually fails first
Treated pine paling	15 to 20 years (up to 25 maintained)	Posts rotting at ground level
Treated pine, lapped & capped	18 to 25 years	The capping protects the paling tops, but the posts still decide it
Hardwood posts, treated pine rails and palings	No single figure: it depends on the post species and its durability class (see why the posts decide)	Often the palings and rails, which can be replaced without disturbing sound posts
Hardwood paling	20 to 30 years	Rails and fixings before the timber itself
Colorbond steel	20 to 30+ years	Impact damage; salt corrosion close to the coast
Timber picket (front)	15 to 25 years painted	Paint neglect, then moisture in the joints

Typical industry figures, not a guarantee (sources at the end of this guide). Ranges assume professional installation with posts set in concrete. Good footings plus regular maintenance push a fence to the top of its range or beyond, while dirt-set posts can halve these numbers.

Which fencing lasts the longest?

Of the fences most Melbourne homes choose, Colorbond steel and well-built hardwood fences sit at the top, typically 20 to 30 years or more. Steel cannot rot or attract termites, which is why it suits a set-and-forget boundary. Brick and rendered masonry walls can outlast both by decades, but they are a very different budget, and taller masonry walls may need a building permit, so check with your council (our fence permit guide covers the basics).

Among timber fences, the rough order is treated pine paling, then lapped and capped, then hardwood palings. But construction can move any of them up or down that list. A timber fence on shallow, dirt-set posts can fail before a well-built one is halfway through its life.

So the honest answer is: the fence that lasts longest is the one with durable posts, proper concrete footings, three rails and timber kept off the ground. Material matters, construction matters more. If you are weighing steel against timber, see Colorbond vs timber fencing.

Why the posts decide a fence's life

Palings and rails live above ground, where they dry out between showers. Posts are the only part of a fence buried in damp soil, which is the harshest place for timber. When posts rot at ground level the whole fence leans, and no amount of new palings will save it. In practice, a fence's lifespan is its posts' lifespan.

Durability classes, in plain English

Australian Standard AS 5604 rates the heartwood of each timber species into four natural durability classes. WoodSolutions, the Australian timber industry's information service, publishes the probable in-ground life of each class:

Durability class	Probable in-ground life (heartwood)
Class 1	More than 25 years
Class 2	15 to 25 years
Class 3	5 to 15 years
Class 4	Less than 5 years

Ratings apply to heartwood only. Sapwood, the outer band of the log, is not durable and is readily attacked unless it has been preservative treated.

This is why "hardwood post" on a quote is not the whole story. The species, whether the post carries untreated sapwood, and how it is set in the ground all matter. It is fair to ask your fencer which species they use and what durability class it carries.

Treated pine posts

Untreated radiata pine sits in Class 4, the lowest durability rating, so treated pine relies entirely on its preservative treatment. For posts in the ground, look for H4, the hazard class the industry lists for fence posts. H3 treated timber is made for above-ground use, like palings and rails, not for burying. Treated pine posts can do a reasonable job, but cut ends and the ground line are their weak points.

What a long-life footing looks like

Posts set in concrete, at a depth that suits the fence height and the soil.
Concrete finished to shed water, sloped away from the post so rain runs off instead of pooling against the timber.
Three rails on a standard paling fence, so the palings stay straight and the load is spread across the posts.
Posts spaced to suit the height and wind exposure. Our paling fence heights and post spacing guide explains 1.8m vs 2.1m and why taller fences need more support.

Our standard build uses hardwood posts set in concrete with three rails. For the full comparison of species, treatment and what to ask for, read hardwood vs treated pine fence posts: which lasts longer?

What separates a cheap quote from a fence that lasts

Two quotes for the same boundary can be a long way apart, and the difference usually shows up years later, not on day one. Compare them line by line: post material and species, footing method (concrete or dirt-packed), number of rails, paling thickness and overlap, whether capping is included, and whether removing and disposing of the old fence is in the price. A lower price is not automatically a worse fence, but you want to be sure you are comparing the same fence. Our 12-point checklist for comparing fence quotes walks through each item, and paling fence cost per metre covers typical market prices and what moves them.

The five things that kill fences early

Dirt-set posts. Posts packed with soil instead of concrete stay damp at the base and rot years earlier. Concrete-set posts are the single biggest lifespan upgrade a fence can have.
Poor drainage. A fence line that stays wet after rain, garden irrigation against the fence, or a downpipe discharging along the boundary keeps post bases saturated.
Soil and garden beds against the palings. Timber touching soil wicks moisture constantly. Keep beds, mulch and lawn build-up a few centimetres clear of the timber, or use a plinth board (a sacrificial horizontal board at the base) to take the contact instead.
No coating. Bare treated pine is protected against rot and insects but still weathers: UV greys it, and wet-dry cycles crack it. A stain or paint, applied once new timber has dried out (usually a few months after the build), meaningfully slows this. See how to paint a timber fence so it lasts.
Undersized or too few rails. Two rails on a 1.8m fence are more prone to sagging and bowing under the paling weight over time. Three rails is the standard for a reason, and taller fences need the extra support even more.

A simple fence maintenance schedule

When	What to do
A few months after the build	Once new treated pine has dried out, apply a quality exterior stain or paint.
Every autumn	Walk the fence line: push each post for movement, look for palings touching soil, and clear vegetation and mulch off the base.
After strong winds or storms	Check for loose or missing palings, cracked rails and posts that move. Small repairs suit a handyman. If a section has come down, our guide to a fence blown down in a storm covers who pays and what to do in Victoria.
Every few years	Re-stain or repaint, sooner on the sunny side. Re-tension gate hinges and latches.
Year 12 to 15	Start budgeting: probe the post bases at ground level with a screwdriver. Soft timber means replacement is on the horizon.

Repair or replace? The honest test

Small repairs, like a few loose palings or a single cracked rail on otherwise solid posts, suit a handyman: quick, cheap, and the fence keeps its remaining life. Replace when posts have gone soft at ground level, a whole run leans, or you are repairing it every year. A useful rule of thumb: if more than a third of the fence needs work, replacement wins on value over the next 15 to 20 years, because repairs on a rotten frame never stop.

If it is time, our fence replacement guide walks through the whole process, from the neighbour conversation to build day, and old fence removal covers demolition, disposal and older fibro fences. If the fence is shared, the Fences Act cost-sharing guide explains who pays what, and neighbour won't pay for the fence? sets out your options. For a broader price picture, see the cost of fencing in Melbourne.

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Fence lifespan FAQs

How long does a timber fence last in Melbourne?

A treated pine paling fence typically lasts 15 to 20 years in Melbourne, and a well-maintained one often reaches 25. The build quality decides most of it: concrete-set posts, good drainage and palings kept clear of soil push a fence to the long end of the range, while dirt-set posts and constantly damp ground can halve its life.

How often should a wood fence be replaced?

In Melbourne, a typical treated pine paling fence is due for replacement every 15 to 20 years, and a well-built, well-maintained one can reach 25. Go by condition rather than the calendar: soft timber at the base of the posts, a lean along a whole run, or repairs every year are the signs it is time. Our fence replacement guide covers what happens next.

How long does a Colorbond fence last?

A Colorbond steel fence typically lasts 20 to 30 or more years in Melbourne with very little maintenance. Steel does not rot, warp or attract termites, and the colour is bonded to the metal so there is nothing to repaint. Its main risks are impact damage and, close to the bay or ocean, salt corrosion. Any BlueScope warranty is a separate promise with its own eligibility criteria, so check the terms with your supplier.

Does painting a fence make it last longer?

Yes, for the timber above ground. A quality exterior stain or paint slows the UV greying and wet-dry cycling that crack and cup palings, and keeps the fence looking newer for longer. It does not stop posts rotting at ground level, which is the most common reason fences fail, so a coating works best on a fence that is also well built. Let new treated pine dry out for a few months first, then recoat every few years. Our guide on how to paint a timber fence so it lasts covers prep, products and timing.

How do you keep a wooden fence from rotting?

Keep soil, mulch and garden beds a few centimetres clear of the palings, or fit a plinth board at the base to take the ground contact. Stop sprinklers and downpipes wetting the fence line, coat the timber, and check the post bases every autumn. At build time, the biggest wins are durable hardwood or H4 treated posts set in concrete that is finished to shed water away from the timber.

What makes a fence fail early?

The five common killers are: posts set in dirt instead of concrete, poor drainage keeping the post base wet, soil or garden beds piled against the palings, no coating (bare timber weathers faster), and undersized or too few rails that sag under the paling weight. Most early failures trace back to one of these.

Should I repair or replace my fence?

Small repairs suit a handyman when the posts are still solid and the damage is limited to a few palings or one rail. Replace when posts have rotted at ground level, the fence leans along a whole run, or repairs have become a yearly event. As a rule of thumb, if more than a third of the fence needs work, replacement is usually better value over the next 15 to 20 years.

Related guides

Areas we serve

Timber paling fencing by region: Eastern suburbs · South East Melbourne · Western suburbs · Northern suburbs

Close to home in the south-east: Heatherton · Cheltenham · Mentone · Moorabbin · Brighton · Bentleigh

Lifespans in this guide are typical industry figures for Melbourne conditions, not a guarantee, and vary with site conditions, materials and workmanship. Sources: WoodSolutions Durability Guide (AS 5604 natural durability classes and H-class treatment levels) and BlueScope warranty information for fencing made from COLORBOND® steel. General information only, current at October 2026.