Aluminium Slat Fencing Costs SA 2026 - Get Free Quotes

Aluminium Slat Fencing Costs in South Australia

Slat fencing across South Australia generally costs $190 to $350 per lineal metre for vertical slat, $200 to $320 for a 65 millimetre horizontal blade, $230 to $380 for a 100 millimetre blade and $280 to $450 for 150 millimetre and wider. Screen panels run $400 to $1,200 and slat gates $700 to $1,800. Those ranges hide the specification, and the specification is the entire story with this product.

Slat fencing photographs beautifully and it is the style driving most current demand in Adelaide, particularly on the infill blocks and townhouse developments where a neighbour's window is eight metres away. It is also the fencing product where the gap between a good installation and a poor one is widest, because the failures are gradual. Blades that ripple along their length. A fence that flexes when you lean on it. Visible sag in the middle of each bay. Fixings that work loose over a couple of summers.

None of that is visible on the day it goes up, and all of it is predictable from three numbers. Blade depth, meaning how far the blade projects from front to back rather than how wide it looks. Post spacing, meaning the unsupported span each blade has to cross. And wall thickness, meaning how much metal is actually in the extrusion. Get those three right and the fence stays flat for decades; get them wrong and it looks tired in three summers.

Almost no quote volunteers them. This page is about knowing what to ask. The broader material argument for aluminium, covering corrosion, coastal performance and comparison against other fencing, sits in the SA aluminium fencing guide rather than being repeated here.

Blade Sizes and What They Mean

Blades are described by width first because that is what you see, and width is the least important of the dimensions.

Common widths run roughly 50, 65, 100, 150 and 200 millimetres. Wider blades give a bolder, more contemporary appearance with fewer horizontal lines across the fence, and they cover a given height with fewer runs, which can offset their higher individual cost. Narrower blades read closer to timber batten work. Depth is the dimension that matters structurally and it is rarely quoted. It typically runs from around 16 millimetres on light blades up to 40 or 50 millimetres on heavy ones, and it describes how far the blade projects back from its face.

Wall thickness is the third figure, generally somewhere between 1.0 and 2.0 millimetres, and it determines how much metal is in the section for the same outside dimensions.

The combination is what you are buying. A 150 millimetre wide blade at 16 millimetres deep with a 1.1 millimetre wall is a very different product from a 150 millimetre blade at 30 millimetres deep with a 1.8 millimetre wall, and from the street on installation day they look identical. The first will show deflection and drumming in wind within a season on a long span, and the second will not. Ask for all three numbers. A supplier who publishes them is confident in the product, and a quote that describes only the width and the colour is describing an appearance rather than a specification.

Blade Depth and Angled Privacy

Here is the thing most people never consider until the fence is up, and it explains why two fences with the same gap can deliver very different privacy. Standing directly in front of a slat fence, the gap is the gap and you see through it. Move to an angle and the geometry changes, because a deeper blade means the gap is effectively a short tunnel rather than a slot, and the blade above and below block the oblique line of sight.

The practical effect is substantial. A 20 millimetre gap between blades that are 16 millimetres deep gives you a fence you can see through from a fair range of angles. The same 20 millimetre gap between blades 40 millimetres deep blocks the view from anywhere except close to square on, which in a real backyard is most of the time, because neighbours and passers by are rarely standing directly in front of your fence looking through it perpendicular.

This matters because the usual response to wanting more privacy is to tighten the gap, which adds blades and cost quickly. Choosing a deeper blade at the same gap is frequently cheaper for the same practical result, and it produces a stiffer fence at the same time. Angled blades take the idea further, with louvre profiles set at a fixed angle so the view is blocked entirely from one direction while airflow and light continue. That is the same principle applied harder, and it is why louvre systems use the geometry rather than closing the gaps.

Ask to see a sample panel and look at it from the angle your neighbour actually stands at rather than head on. It is the single most useful thing you can do before choosing a gap.

Span, Post Spacing and Sag

This is the engineering that separates a fence that stays flat from one that does not, and the relationship is not intuitive. Every blade between two posts is a small beam. How much it deflects under its own weight and under wind depends on the span, on the metal in the section, and disproportionately on the depth of that section, because stiffness rises far faster with depth than with width or wall thickness alone.

The consequence for a fence buyer is simple. Depth buys you span. Typical post spacings run from around 1.2 metres up to 3 metres. At 1.2 to 1.8 metres almost any reasonable blade performs, which is why cheap systems look fine on short runs and in showroom displays. Push to 2.4 metres and the difference between a shallow blade and a deep one becomes visible. At 3 metres only a properly sized section holds a straight line.

Australian Standards cover both wind actions on structures and the design of aluminium sections, and those standards are published by Standards Australia. Wider post spacing is also where a cheaper quote hides, because fewer posts means fewer footings, less excavation and less labour, and the saving is real. What you buy with it is a longer unsupported span on the same blades.

The symptoms show up in the second and third summer. A visible dip in the centre of each bay, blades that ripple rather than run straight when you sight along them, movement and noise in wind, and fixings working loose as the blade flexes against them repeatedly. Ask two questions of every quote. What is the post spacing, and what blade depth is being used at that spacing. A contractor who has thought about it will answer both immediately, and one who quotes a three metre span on a shallow blade is selling you a saving you will see later. Fence repair contractors deal with the results.

Fixing Systems Compared

How the blades attach affects appearance, longevity and whether the fence can ever be repaired, and there are three broad approaches.

Face fixed means the blades are screwed through their face into rails or posts. It is the cheapest and quickest method, it is strong, and the fixings are visible as a row of screw heads down each post line. Individual blades can be removed later, which matters for repairs. Concealed or clip systems hold the blade in a bracket or channel with no visible fixing from the front. They look considerably cleaner and they cost more in both components and labour. Repairability varies by system, and some require dismantling a run to remove one blade in the middle.

Routed or slotted posts have the blade ends housed into machined slots in the post itself, which gives the cleanest appearance of all and the most rigid connection. It is the most expensive, and it is the least forgiving of ground movement because the blade is captured at both ends.

Each is a legitimate choice. What matters is knowing which you are getting, since a quote saying slat fencing covers all three at quite different prices. Two follow up questions are worth asking. Can a single damaged blade be replaced without dismantling the run, because impact damage happens and a system requiring a full strip down turns a small repair into a large one. And are the fixings stainless or otherwise compatible with aluminium, because steel screws into aluminium corrode and streak the panel.

On a boundary where the fence is visible from both sides, ask which side the fixings show on, since face fixed systems have a good side and a working side and that is a conversation to have with a neighbour not after installation.

Heat Movement and Fixings

Aluminium moves more with temperature than steel does, and on a long horizontal blade in an Adelaide summer that movement has to go somewhere. A north or west facing dark slat fence sees air temperatures above 40 degrees, direct sun for hours, surface temperatures well above ambient, and a substantial drop overnight. That cycle repeats through summer, and the blade lengthens and shortens each time.

The fixing method determines whether that is a problem. Systems that clamp a blade rigidly at both ends have nowhere to put the movement, so it goes into bowing, into stress at the fixings, and into the clicking and ticking noises people report from slat fences on hot afternoons. Systems that allow the blade to slide slightly within its housing accommodate it and stay quiet and flat.

Run length compounds it, since twenty metres of continuous blade expands more in absolute terms than a two metre panel does. Good practice breaks long runs at posts rather than treating a whole boundary as one element, and uses a fixing method with some tolerance. Colour choice contributes as well, because a light or mid tone fence runs measurably cooler than a black one and moves less.

Ask specifically how expansion is allowed for on any run longer than about ten metres facing north or west. It is a reasonable question and the answer tells you whether the installer has done many of these in this climate.

Horizontal Against Vertical

The two orientations are different products with different strengths, and the choice is usually made on appearance alone. Horizontal slat is the contemporary look and it is what most people picture. It emphasises width, it suits modern architecture, and it spans between posts so the blade length equals the post spacing.

Vertical slat reads more traditionally, closer to a picket or a batten screen, and sits visually between slat and steel picket fencing. The blades span between top and bottom rails instead, which is usually a shorter distance, so the same section performs better with less deflection.

Four practical differences follow from the orientation. Vertical handles sloping ground far better, because the blades stay vertical while the fence steps down, whereas horizontal blades must either step in visible jumps or rake at an angle. Vertical provides no footholds, which matters where a fence borders a pool area, while horizontal blades are exactly the foothold pool barrier rules are written about. Horizontal collects dust and leaf litter on the upward face of every blade, and vertical sheds it. And vertical typically needs more posts for the same run, which costs more upfront and gives a stiffer result.

Neither is better. Horizontal is chosen for the look and it carries more constraints, particularly around slope and pool areas, which is worth knowing before the design is fixed. Pool barrier requirements rule horizontal out as a barrier in most cases.

Why Horizontal Struggles on Slope

A large share of Adelaide's Hills face and southern suburbs sit on ground with a fall, and horizontal slat handles that poorly. A horizontal blade wants to be horizontal. When the ground falls away, the fence has two options and neither is ideal.

Stepping keeps every blade level and drops the whole panel at each post, which produces a staircase profile along the fence and a triangular gap under each panel at the low end. That gap has to be dealt with, either by extending the blades down, adding a plinth, or accepting it. Raking tilts the blades to follow the slope, which keeps the bottom line parallel to the ground and means the blades are no longer horizontal. On a gentle fall it reads fine. On a steeper one it looks unmistakably like a fence trying to be something it is not, and it fights the horizontal architecture that motivated the choice in the first place.

There is a compounding South Australian factor. Reactive clay soils move seasonally, and on a stepped horizontal fence any post that shifts breaks the alignment of a strongly horizontal line, which the eye picks up immediately. The same movement in a vertical slat or tubular fence is far less visible because there is no long horizontal reference line to break. On a sloping block, vertical slat, tubular or a stepped panel system will usually look better in five years than horizontal will, and it will cost less to keep looking right.

Where horizontal is wanted on a fall, the practical answer is shorter bays, deeper footings and accepting stepping rather than raking. Retaining walls that create level terraces are the other approach and they cost considerably more.

Dust and Debris on Blades

Every horizontal blade has a flat upward facing surface, and in parts of South Australia that is a genuine maintenance consideration not a quibble. Hot northerly wind days carry fine dust and grit across the Riverland, the Mallee, the mid north and the upper gulf towns, and that material settles on and stays on horizontal surfaces. A slat fence with fifteen blades has fifteen ledges collecting it.

Vertical slat sheds the same material almost entirely.

The consequence is appearance not damage. A dark fence shows dust immediately and a pale one shows it less, while a mid tone hides it best, which is the same reasoning that applies to colour choice generally in dusty districts. Leaf litter is the related issue in the Adelaide Hills and any established garden, since a close spaced horizontal fence catches leaves between the blades and holds them. In a mapped bushfire hazard area that is a fine fuel accumulation against a structure, and it belongs on the same seasonal clearing list as gutters. Preparedness information is published by SAFECOM.

Cleaning is simple with a hose and a soft brush, and the point is knowing the fence needs it. A horizontal slat fence in a dusty or leafy location is a two or three times a year job rather than a set and forget one.

Screens Rather Than Fences

Slat is often better used as a screen than as a boundary, and this is where it delivers the most value per dollar.

A screen panel does a specific job in a specific place. Hiding a pool pump and filtration equipment. Concealing bins beside a driveway. Screening an air conditioning condenser. Blocking a sightline between a neighbour's window and a deck. Creating privacy at one end of a courtyard without enclosing the whole yard.

Panels for those uses run $400 to $1,200 depending on height and blade, against several thousand for a full boundary run.

There is a design argument as well. A full boundary in horizontal slat can read as heavy and can make a small Adelaide courtyard feel closed in, while a screen at the point of the problem, with a cheaper fence elsewhere, often looks better and costs a fraction. Two cautions apply to equipment screens. Air conditioning condensers and pool pumps need airflow, so a screen must not choke them, and manufacturers specify clearances that a solid screen placed too close will breach. And anything screening pool equipment sits near the barrier, so it must not create a climbing route into the pool area.

Slat also works well combined with other materials, with a Colorbond boundary carrying the length cheaply and slat used at the front, on gates and at the specific spots where appearance matters. Privacy screens and Colorbond fencing cover those combinations.

In Ground, Surface and Subframe

How the posts are held determines both the cost and the performance, and there are three arrangements.

In ground posts are concreted into an excavated footing and this is the strongest and usually the cheapest method. Footing depth and diameter matter more than people expect on Adelaide's reactive clay, and they matter more again for a slat fence than a tubular one because a near solid panel carries a much larger wind load into the post.

Surface mounted posts use a base plate bolted to concrete, paving or a deck, which is the answer where digging is not possible. It adds roughly 5 to 15 per cent, it relies entirely on the substrate underneath, and a base plate bolted into thin or cracked concrete will move regardless of how good the fence is.

Subframe systems build a frame that the blades attach to, which suits screens, panels between existing structures, and situations where the blades span between a house wall and a post rather than between two posts.

The question to ask on any surface mount is what the concrete is and how thick, because that is where the load ends up.

For in ground, ask the footing depth and diameter and whether it increases for gate posts and for taller or closer spaced panels. A gate applies an eccentric load every time it swings, meaning it pulls sideways on the post rather than straight down, and a slat gate is heavier than a tubular one.

Where the fence sits on or behind a retaining structure, the wall governs everything above it, and that assessment comes first. Gate and automation contractors handle the moving components.

What Drives the Price

Blade width, gap and wall thickness together set the metal per metre, which is the base of the price since aluminium is sold by weight.

Blade depth drives both cost and performance, and it is the specification most worth paying for because it buys span and stiffness at once.

Post spacing cuts both ways, with wider centres reducing footings and labour while lengthening the unsupported span.

The fixing system carries real labour cost, with concealed and routed systems taking longer than face fixed while looking better.

Mounting method adds where posts sit on concrete or a deck rather than in the ground, and ground conditions vary widely across this state.

Gates cost more in slat than in tubular because the leaf is heavier and needs a stiffer frame and better hardware.

Slat Fencing Costs Across Adelaide

Adelaide pricing is driven almost entirely by specification rather than location.

Row three is where people usually spend money for privacy. Row two on a deeper blade frequently achieves a similar result at an angle for less, which is the practical takeaway from the depth and privacy section above.

Regional South Australia

Regional pricing carries freight, and slat is bulky, pre-finished and easily marked in transit, so it matters more here than for most products.

The Adelaide Hills is where the orientation decision matters most, since sloping blocks are the norm and horizontal slat either steps visibly or rakes awkwardly. Vertical slat on the same block usually looks better and holds its appearance longer through seasonal ground movement.

Inland districts add the dust consideration, where horizontal blades collect grit from northerly wind days and mid tone colours hide it far better than dark or pale ones.

Coastal and gulf locations need stainless or compatible fixings throughout, and the point applies to slat as much as any aluminium fence since a face fixed system has a great many fasteners.

Lead times are the practical constraint further out, since slat is made to order and freighted, so allow longer than a metropolitan project and group any gates and screens into the same delivery.

What to Look Out For

Ask for blade width, depth and wall thickness in writing. Width is what you see, depth is what keeps the fence flat, and thickness is what you feel when you press on it.

Ask the post spacing and match it against the blade depth. A three metre span on a shallow blade is a saving you will notice in the third summer.

Look at a sample panel from an angle rather than head on, because a deeper blade at the same gap often gives the privacy you want without tightening the gap and paying for extra blades.

Confirm the fixing system and whether a single damaged blade can be replaced without dismantling the run. Impact damage happens.

Ask how expansion is allowed for on long runs facing north or west, since a rigidly clamped blade in an Adelaide summer bows and clicks.

On a sloping block, ask to see how the fence handles the fall before committing to horizontal, and take a recommendation to go vertical seriously.

Finally, check fixings are stainless or compatible with aluminium, and confirm footing depth and diameter with any variation for gates. Consumer guarantees are administered by the ACCC, and licensing and business obligations by Consumer and Business Services.

What to Look for in a Quote in SA

A slat fencing quote worth comparing gives you numbers not a style name.

Specifically: lineal metres and height, blade width, depth and wall thickness, the gap dimension, the number of blades per panel, post section size and spacing, the fixing system named and whether fixings are visible from one or both sides, fixing material, footing depth and diameter with variation for gate posts, the mounting method where posts are not going in the ground, how the fence handles any slope, expansion allowance on long runs, all gates with hardware, colour and powder coat grade, lead time, and the warranties on coating, product and installation.

When you enquire, give the length and height, say whether the ground is level or falling and by roughly how much, describe what you are screening and from where, say whether the fence is visible from both sides, mention the orientation of the run since a north or west facing fence has heat considerations, note how close you are to the coast, and flag any concrete, paving or deck the posts would sit on. A photograph along the fence line showing the fall is more useful than a measurement.

Get three quotes and put the specifications side by side before the totals. On this product more than any other fencing type, the cheapest quote is usually a thinner blade at a wider span. Keep the blade profile, dimensions, colour code, fixing system and supplier with your property records. A replacement blade after impact damage, an extension, or a matching gate years later depends entirely on that information, and slat profiles are not interchangeable between suppliers. You will also find tubular fencing and powder coated fencing contractors here for related work.