A timber paling fence lives or dies by its posts. Pretty palings and straight rails count for little if the uprights move, rot, or heave after the first wet season. Ask any seasoned timber paling fence builder and they will tell you most callbacks start at ground level. The post setting method has to match the soil, the fence height, the wind exposure, and what the client values most. Cost, speed, longevity, and the mess left behind all turn on how you choose to anchor a post.
This guide pulls together what working crews discuss on site and what a good timber paling fence installer explains to clients before the auger touches soil. It is not about brand hype or one true way. It is a practical map of options, trade offs, and small decisions that determine whether a fence stays plumb for 15 years or starts leaning by Christmas.
What makes a sound footing for a paling fence
Think of a post footing as a permanent negotiation with the ground. The soil shrinks and swells, shifts with water, compacts under load, and in some places freezes. A well set post absorbs those cycles without letting the fence rack or lift. That starts with a few fundamentals:
- Embedment: As a rough rule, bury one third of the post length. For typical 1.8 to 2.1 m high timber paling fencing, most installers aim for 600 to 900 mm in the ground. Taller screens and wind exposed corners need more. Diameter: You want enough side area for the soil or concrete to grip. A 150 to 200 mm hole might hold a mailbox post, not a boundary fence. For a 2 m fence, many crews dig 250 to 300 mm, and up to 350 mm where clay is reactive or wind loads are high. Drainage: Water should not sit against timber. Even with H4 treated pine, constant saturation shortens life. Footings that shed water and avoid a bathtub effect do better. Alignment: The post must be plumb in both directions, and in line with the string. A few millimetres at the post becomes a wavy top line over 20 metres. Curing or consolidation: Whatever you backfill with has to set or compact properly. That takes time. Premix concrete needs a few days before you hang rails. Dry pack or gravel needs real compaction, not a few taps with a boot.
A timber paling fence contractor earns their keep by reading the site early. Sandy cut, black soil, reactive clay, rubble backfill under new turf, or a narrow side return where you can barely swing a shovel all change the approach. So does a client who wants gates hung off corner posts or a neighbour who insists on exact boundary placement.
The main post setting methods, as used on real jobs
Installers argue about this at the ute tray, but the truth is each method has a place. Below is a compact comparison to frame the choices, followed by deeper notes on how each one works in practice.
- Wet concrete footing: Most common, reliable in mixed soils, slower to build on. Dry pack concrete: Faster to handle, cures as the soil moisture wicks in, sensitive to technique. Compacted gravel or crushed rock backfill: Excellent drainage, good in coarse soils, needs careful compaction. Expanding foam post mix: Very fast, tidy, not for high load or wet clays, cost per hole is higher. Driven steel post with timber rails and palings: Great where you cannot dig, minimal spoil, brace points matter. Screw piles with post brackets: Expensive but stable, ideal for reactive clay or near trees, quick to build on.
There are also hybrid options like strip footings with stirrups where you want a straight base for stepped fencing on a steep slope, or chemset anchors into existing concrete where the fence sits on a retaining wall. A thoughtful timber paling fence contractor keeps these in the kit.
Wet concrete footings done right
Ask ten timber paling fence installers how to set posts in concrete and you will hear fifteen methods. The core is simple. You dig a clean hole, set the post plumb, and pour a workable concrete mix around it. The details separate a lasting footing from an expensive garden ornament.
Hole shape matters. A neat, straight sided hole is easy to pour but a bell shaped base resists uplift and overturning better. If the soil allows, undercut slightly at the bottom to create a mushroom. In mixed clay and loam this helps, in loose sand it can collapse the sides, so judge it on the day.
On mix, bagged 20 MPa premix suits most fences. It is consistent and forgiving. If batching by shovel on a small job, aim for a low slump mix that holds shape when shoveled, not a sloppy soup. Watery concrete shrinks as it cures and leaves gaps against the post. Most installers keep the top of the footing slightly domed above ground to shed water away from the timber.
Bracing makes the day smoother. Crew habit varies, but two timber braces per post, set at right angles, allow you to adjust plumb with screws before you pour. On a long run, we string line top and face, then check each post with a level as the footing goes in. Concrete has a sneaky way of nudging a post as it settles.
Cure time depends on weather, mix, and hole size. Many a timber paling fencing builder has hung rails the next day and regretted it when a gust kinks the alignment. If time permits, leave 48 to 72 hours, especially for gate posts that take point loads and need more meat in the footing.
Where this method shines:
- Mixed or unpredictable soils. Sites that hold water after rain, as the domed top reduces ponding. Boundary lines with shared responsibility, because the result is neat and standard.
Where it misfires:
- Reactive clays that pump water and shrink hard. Monolithic concrete can break free as the soil moves, creating a loose sleeve. Good drainage and a bell base help, but in severe sites, consider screw piles or gravel backfill around a central concrete plug. Tight courtyards with no place for spoil. Concrete needs hole volume plus room for brace stakes, and it brings in heavy bags.
An anecdote from a job in Bentleigh sums it up. The site was old fill, random bricks in clay. We widened to 350 mm at the base, poured low slump concrete, and bellied the bottoms. That fence took 36 hours longer than a straightforward run, but five years on it is still plumb, and next door’s light set posts show a consistent lean.
Dry pack concrete, not the same as wet
Dry pack is premix poured into the hole dry or slightly damp, around a plumb post. You rod it in lifts and mist the top. The ground and air moisture hydrate the cement over a few days. It is popular because it is quick, clean, and you can move fast down a long line without mixing buckets.
Two keys decide success. First, compaction in layers, usually 150 to 200 mm at a time. If you just dump and tamp the top, voids remain, and the post will rock by the first windy night. Second, moisture management. In dry sandy soils, the pack may not get enough water to cure evenly unless you soak the hole first and mist the surface for a day or two. In heavy clays, the soil can be wet enough already.
A dry pack footing grips the post and the soil rather than forming a single block like wet concrete. That grip can be helpful in reactive clay because it allows small seasonal shifts without cracking a monolith. The trade off is early strength. Many crews wait a day or two before fixing rails, especially where the fence will cop wind.
It suits production lines. A timber paling fence builder with an auger on the ute and a labourer on tamp duty can set 30 posts in a day if holes are friendly. The site stays neater because you are not rinsing mixers. The risk is uneven technique across a mixed skill crew. If three people tamp three holes differently, the fence will tell on handover.
Compacted gravel or crushed rock backfill
Gravel backfill, often 10 to 20 mm crushed rock, gives excellent drainage and a surprisingly firm hold if placed and compacted properly. The idea is to create a dense, interlocked mass that grips the post and sheds water away from it. On H4 treated pine posts this is kind to the timber long term because it avoids wet feet.
You dig a clean hole, set the post, and add gravel in 150 mm lifts, compacting hard with a narrow tamper. As you go, keep checking plumb. The friction angle of the aggregate and the lateral pressure of the compacted stone lock the post. Done right, the post feels rock solid immediately. The catch is that loose lifts feel solid under a boot but will settle later. Proper tamping is not a gentle tap. It is a firm kneading in layers.
This method shines in sandy soils or any well draining subgrade. It is a favorite near trees where keeping moisture away from timber is smart, and around services where you want something you can excavate again without a jackhammer. We often use a hybrid on slopes, a gravel surround with a small concrete plug at the base to resist uplift.
Where it fails is gummy clay. If the sides of the hole smear with slick clay, the gravel can act like bearings. In that case you are better off roughing the sides with a bar, widening the base, or changing methods. Also, avoid fine crushed rock with lots of dust. It binds too much water, then shrinks, leaving gaps.
Expanding foam post mix
Foam is the darling of small DIY jobs because it is tidy and fast. Two liquid components mix, expand in the hole, and harden around the post within minutes. For a light screen or a letterbox it is brilliant. For a boundary paling fence with wind loads, it is a judgment call.
The good bits are obvious. No water, no mixer, minimal clean up, and you can set a short run after work without building a construction site. The foam flows into voids, so on rubble sites it can find a seat where concrete would bridge. For a timber paling fencing installer doing spot repairs or replacing a couple of posts in an established garden, foam avoids the sore back from moving bags.
Limitations matter. Foam does not add much mass, so the post relies on the bond to the soil. In soft wet clays or silts, or where uplift from wind is strong, that bond may not be enough. Cost per hole is higher than premix concrete. If you go this route, watch temperature, follow the hole size printed on the kit, and brace well. Do not try to backfill over foam as it expands. https://canvas.instructure.com/eportfolios/4312042/home/picking-the-right-wood-for-your-timber-paling-fence-job You will chase the post forever.
Driven steel posts with timber rails and palings
You do not always have the luxury of digging holes. Between services, over rock, or where spoil removal is painful, driven steel can save a day. Steel posts, often galvanised C or SHS sections, drive with a jackhammer or driver, then you fix timber rails to the steel with brackets and hang palings as usual.
The result is sturdy and quick. No concrete, minimal mess, and immediate strength. We use this in narrow side returns, along driveways where clients want to pour concrete later, or over old compacted road base where an auger will just skate. The look stays timber once the fence is clad.
Details matter. The steel size must suit the fence height and wind. Rails need proper standoff brackets so water does not trap. And you have to drive plumb. There is no cure time, so errors lock in. When a timber paling fence contractor suggests this, they should also talk rust protection at ground line and capping to keep water out of the section. With the right spec, service life is excellent.
Screw piles with post brackets
Screw piles feel like overkill until you work a reactive clay site or a coastal block with a high water table. They thread into the ground with a small excavator or handheld drive head, past the soft topsoil into competent layers. A bracket then holds a timber post, or you bolt rails to a steel headstock.
They are not cheap. Supply and install per pile can match a full day’s labour with concrete on a short run. But speed and certainty balance the ledger on difficult sites. There is almost no spoil, almost no mess, and you can build immediately. Movement over seasons is lower because the helix sits below the active zone of clay or below the scoured sand layer. Near big gums where roots make digging a nightmare, screw piles glide between roots with less damage.
For a timber paling fencing contractor, screw piles are a professional option clients appreciate when the site screams trouble. Corners and gate posts benefit most. On long straight runs, you can mix methods, screw the critical points, and set intermediate posts in concrete or gravel.
Stirrup posts on strip footings or pads
Sometimes you need a neat top line over a stepping site or you are building over an existing slab or retaining wall. Casting a narrow strip footing and setting galvanised stirrups allows you to bolt timber posts above ground. It keeps timber out of soil, great for longevity, and creates a crisp datum to step palings to.
You need formwork, rebar, and good layout. It adds time and cost. For feature front fences and tight setbacks where garden beds will build up later, this method pays back in clean lines and longer service. Chemset anchors into existing concrete work well where the base is sound and thick enough. A careful timber paling fence installer will confirm depth and condition before promising anything over an old strip.
Choosing the right method for your fence
Contractors hate rigid rules for good reason. Site conditions outvote theory by morning tea. Still, a few patterns hold up:
- For typical suburban lots with mixed soils and 1.8 to 2.1 m paling fences, wet concrete or dry pack concrete gives consistent results at a fair cost. For sandy and free draining areas, compacted gravel performs beautifully and is kind to timber. For reactive clays or near large trees, think screw piles for corners and gates, and consider gravel surrounds to keep posts drier. For access constrained sites or along hardstand, driven steel posts with timber cladding save time and disruption.
A reliable timber paling fence installer will ask about wind exposure, soil type, and whether gates or screens will hang off certain posts. They may probe the soil with a bar before quoting. The best timber paling fencing builders also plan the work sequence to protect fresh footings from curious pets, kids, or those sudden afternoon storms.
Real site variables that skew the decision
Water is the silent saboteur of fence posts. If the garden bed will be built up later, warn the client that burying more of the post or covering the footing invites rot and movement. On a sloping block, water runs along the rails and finds weak points. We often seal rail ends and use a slight bevel on post tops to shed water. Small touches, real gains.
Wind exposure varies across a single property. A downwind corner behind a garage may never see a gust, while the front corner cops the full street funnel. If budget is tight, put the bigger holes and stronger footings at the windward ends and where gates hang. Do not scrimp on the centre post of a double gate. If that footing moves, the latch will not meet.
Services decide methods more than owners realise. Gas, power, fibre, and irrigation lines snake along fences. Always use the local dial before you dig service. Even with plans, probe cautiously. A timber paling fencing contractor with a good record leaves tidy holes rather than apologising for a cut cable.
Timber spec matters as much as footing. H4 treated pine for in ground posts is the baseline. H3 or untreated posts do not belong in soil. For rails, H3 treated pine is common, and for palings, kiln dried palings or green palings both work, but they shrink differently. A solid footing cannot save a fence built of the wrong material.
How deep and how wide, with real numbers
Fence height ties directly to footing size. For a 1.8 m fence with 100 x 75 mm posts, many crews dig 250 to 300 mm wide and 600 to 700 mm deep. For 2.1 m and above, or heavy hardwood palings, deeper at 750 to 900 mm with a 300 to 350 mm diameter is sensible. Corner and gate posts add 100 to 150 mm in depth and diameter.
In cyclone or high wind regions, engineers sometimes specify 900 to 1,200 mm depths and 350 mm diameters, along with bigger sections. If your site is on a ridge or a coastal bluff, a good timber paling fence contractor will quote accordingly. No one enjoys reworking a fence torn by the first strong front.
A short checklist for setting posts like a pro
- String line both top and face, not just one, and check every post with a level as you go. Bell out the base where soil allows, and dome the top to stop water sitting against timber. Compact in lifts if using dry pack or gravel, and do not rush rails onto green concrete. Isolate timber from constant moisture with drainage, gravel collars, or stirrups where practical. Upsize footings at corners, ends, and gates. These are the posts you will be judged on.
Installing on slopes without regret
Stepped versus raked is a style choice with structural consequences. Stepped fences use level rails between posts set to different heights, with palings stepped as you go. Raked fences follow the slope, rails and palings angled. Raked lines look softer on a gentle fall but ask more of footings because each post sees some racking from the sloped rails.
On aggressive slopes, we often set strip footings with stirrups for a clean step pattern. Where clients prefer raked, we increase embedment by a lift, use larger posts, and add a mid rail to spread loads. Either way, layout and post heights need planning before any hole is cut. Nothing burns time like discovering the third bay clashes with a reticulation valve because post heights drifted.
When repairing beats replacing
On old boundary lines, you will meet fences held together by vines and goodwill. Sometimes a client wants just a few posts replaced. If the rails and palings still have some life, you can sister new posts beside the old, set them in fresh footings, then transfer rails. Foam can help on these surgical repairs. Where rot is widespread, a full replacement is kinder to the neighbourly relationship than a patchwork that fails in stages.
For reuses, respect the original alignment. Settled neighbours are used to the line as it lies. A professional timber paling fence builder explains that straightening a bowed fence will move the line and may trigger disputes. Clear communication makes for smooth days.
Tools and workflow that save hours
A two person crew with a decent petrol auger will move faster than three with shovels, assuming the site suits an auger. Keep a digging bar to break glaze on clay and pry rocks. A good narrow tamper is worth more than a gym membership when compacting gravel or dry pack. We carry a post level that grabs the post on two faces, freeing hands during bracing.
Workflow matters more than muscle. On concrete days, mark, dig, and set all posts before any pour so you can adjust the line as a whole. On dry pack days, move in lifts across several holes to keep consistency. Keep spoil stacked on a tarp if the client cares about turf. Clean as you go. No one remembers how many holes you set, but everyone notices a tidy handover.
Cost conversations with clients
Not every job needs the gold standard. A straight 25 metre side fence in forgiving loam can be set in concrete at a friendly price, while a 12 metre front fence in stiff clay with two gates, a slope, and a tight driveway may justify screw piles at corners and gravel surrounds elsewhere. A capable timber paling fence installer will present options plainly. Clients appreciate hearing that we can upgrade just the high load points if budget is tight.
For the record, labour drives cost more than materials in most suburban jobs. Fast methods like dry pack or driven steel can balance higher material prices. Foam is dear per hole, but cheap on time for small fixes. Concrete is low cost per bag, but slow to cure and heavy to move. When you compare quotes from timber paling fencing contractors, ask which post setting method is included and why. It is the heart of the fence.
Small details that stretch a fence’s lifespan
Seal cut ends of treated posts with an appropriate end sealer. Do not leave raw cuts at ground line. Pack the top of concrete a few millimetres above lawn height and slope it away. Keep garden beds from burying post faces. Cap posts where style allows. Use corrosion resistant fasteners, especially within a few kilometres of the coast. A timber paling fencing builder who minds these details leaves fences that look after themselves.
On our crew, we also pre drill rails for screws at consistent spacing. It reduces splitting and vibration on posts that are only a day old in their footings. Little touches, better outcomes.
Final thoughts from the fence line
There is craft in something as humble as a paling fence. The post setting method is not a checkbox. It is a decision shaped by soil, weather, access, and the small realities of a site. Wet concrete, dry pack, gravel, foam, driven steel, or screw piles all have a place. The right choice means fewer callbacks, straighter lines, and clients who wave when you drive past years later.
If you are weighing quotes, ask your timber paling fence builder to talk you through their footing plan. A reputable timber paling fence installer will welcome the question. For larger or trickier projects, look for timber paling fencing contractors who show examples of similar sites. The best timber paling fencing builders are open about trade offs and will tailor the method to suit your ground, not a brochure. That is how you end up with a fence that stays true from the first rain to the fifteenth year.