Aluminium Slat Fencing in Sydney: A Practical Guide

Aluminium slat fencing is a run of horizontal (sometimes vertical) powder-coated aluminium blades fixed between posts, with a set gap between each slat. It is the fence people are usually picturing when they say they want something modern, and it is the one option that lets you dial privacy up or down simply by changing the gap.

It is not the cheapest fence per metre, and it is not the right answer for every boundary. Here is what actually matters when you are choosing one in Sydney.

Where slat fencing works, and where it does not

Slat fencing earns its money where the fence is seen. Front boundaries, courtyard walls, pool surrounds, a screen between a deck and the neighbour, carport and bin screens, and the infill above a low masonry base. In those spots the look is the point and the run is short enough that the cost per metre is manageable. Where the run includes an entry or driveway opening, the gate is usually built from the same blades - see aluminium gates in Sydney.

Where it makes less sense is a long rear boundary that nobody looks at. If the job is simply to stop people seeing into the backyard along fifty metres of fence line, a lapped-and-capped paling fence or Colorbond will do the same job for less. We say so when we quote - there is no sense putting a feature fence where a boundary fence belongs. If you are weighing the options generally, our guide to privacy fence options for Sydney homes runs through the alternatives.

Slat size and gap spacing: the decision that changes everything

Two numbers define the look and the function of a slat fence: the depth of the blade and the gap between blades.

• Narrow blades with a wide gap. Light, airy, architectural. You get screening from an angle as you walk past, but anyone standing square on can see through. Good for a front fence where you want presence without a wall.

• Wider blades with a tight gap. Close to solid. From normal viewing distance you see a surface, not stripes. This is what people want for a pool surround or a screen in front of a neighbour's window.

• Zero gap. Fully solid. At that point you are paying slat prices for what a sheet fence does, so it is usually only worth it for a short feature run.

The practical trick: a gap that looks generous on a sample board looks much bigger on an installed fence, and much smaller from twenty metres away. Before you commit, stand at the distance people will actually view it from. We will hold a sample up on site rather than let you choose off a brochure.

Wind is the other consideration. The tighter the gap, the more wind the fence catches, and the more the posts and footings have to do. On an exposed site a tight-gap slat fence needs closer post spacing and better footings than the same fence in a sheltered courtyard.

Fixed panels or individual slats?

Slat fencing arrives two ways. Pre-made panels come as a welded or clipped unit that drops between posts - faster to install, consistent spacing, and cheaper on a straight, level run. Individually fixed blades are set one at a time onto rails or into routed posts, which costs more in labour but lets the fence follow a slope, turn an odd angle, or run to a height the panel sizes do not offer.

On a level suburban boundary, panels. On a sloping block, a curved run or anywhere the heights are non-standard, individual blades usually give the better finish - stepped panels on a slope leave the triangular gaps that defeat the point of a privacy screen.

Coastal Sydney: the finish is what matters

Aluminium does not rust the way steel does, which is why it is popular from Cronulla through to the Eastern Suburbs and the Northern Beaches. But it is not immune. Salt-laden air attacks the powder-coated finish and works on any exposed cut edge or poor-quality fixing, and once the coating is compromised the aluminium underneath will corrode.

What we watch on coastal jobs:

• The grade of the powder-coat finish. Manufacturers publish different coating grades for marine and non-marine environments - use the one the manufacturer specifies for a coastal site, and follow their own maintenance instructions, because those instructions are usually what any product warranty depends on.

• Fixings. Stainless fasteners, not whatever came in the box. Mixed metals plus salt is a corrosion problem waiting to happen.

• Cut ends. Anywhere a blade or rail has been cut on site needs sealing or capping.

• Washing down. Rinsing salt off a few times a year is genuinely what keeps a coastal aluminium fence looking right - it is the cheapest maintenance in fencing.

For how aluminium stacks up against the other common coastal choice, see aluminium vs Colorbond fencing in Sydney, and our guide to the best fence for coastal Sydney homes.

Posts, footings and the things that go wrong

A slat fence fails at the posts, not the blades. The blades are light and stable; the posts carry the wind load and the weight, and they are what moves if the footings are undersized. On a taller screen with tight spacing, that load is significant.

The other common problems we get called to fix are sagging on long spans without an intermediate post, blades that were cut short and left with a visible raw end, and screens fixed straight onto an old timber fence that then rots out from under them. If you want a slat screen in front of an existing fence, put it on its own posts.

Approvals, pool barriers and boundaries

Height limits and front-boundary controls for any fence are set by your local council, and they vary between LGAs and again inside heritage conservation areas. Check your council's controls and the NSW Planning Portal before settling on a height - our post on council approval for a fence in Sydney explains where to look.

If the slat fence forms any part of a pool barrier, the slat spacing is not a style choice at all - gaps, climbable horizontal elements and clearances all have to meet the pool barrier requirements. Horizontal slats in particular need care here because of the climbability rules. Your council and the NSW Swimming Pool Register are the reference. See our pool fencing guide for the practical points.

Frequently asked questions

How much gap should there be between aluminium slats?

It depends on what you want. A wide gap gives an open architectural look with screening only at an angle; a tight gap gives near-solid privacy but catches more wind. For a privacy screen most people end up at the tighter end. Look at a sample at the real viewing distance before deciding. If it forms part of a pool barrier, the spacing is dictated by the barrier requirements, not preference.

Is aluminium slat fencing good near the beach?

Yes, provided the finish is specified for a coastal environment, the fixings are stainless and any cut ends are sealed. Aluminium will not rust like untreated steel, but the powder-coat finish still has to be right and still has to be washed down periodically.

Can slat fencing go on a sloping block?

Yes. Individually fixed blades follow a slope far better than pre-made panels, which have to step and leave gaps at each step. If the fall is significant, a low masonry or retaining base under the slats is often the cleaner solution - the same principle covered in our post on fencing a sloping block.

Does aluminium slat fencing need painting?

No. It comes powder-coated and is not painted on site. Maintenance is washing it down, more often near the coast, and following whatever the manufacturer specifies for their finish.

Is it more expensive than Colorbond?

Generally yes, per metre, and more again if the blades are individually fixed rather than supplied as panels. Whether it is worth it depends on whether the fence is seen. We will give you both figures on the same quote so you can compare them properly.

Get a quote for aluminium slat fencing in Sydney

We install aluminium fencing and privacy screening across Sydney, and we will tell you straight when a slat fence is worth it and when a simpler fence will do the same job for less. Browse our full range of fencing services, or contact us for a quote and we will measure up and price the options side by side.

Slat screening suits newer estate homes - see fencing in the Hills District.