A Victorian pool barrier is built to one design brief: keeping unaided children under 5 away from the water. The 1200 mm height, the 100 mm gaps, the non-climbable zone, the gate self-close — every figure in AS 1926.1 is set against what a young child can reach, squeeze through, or climb. Pets were never in that brief. The same fence does stop most of them anyway. It’s the exceptions that catch owners out, and they’re worth knowing before you assume one barrier does both jobs.
The Standard Is Child-Calibrated
The dimensions in the Australian Standard come from research on what a young child can physically do, not from anything to do with animals:
- 1200 mm minimum height — measured from the finished ground on the outside (non-pool) side, set above a young child’s climb-and-reach from flat ground.
- 100 mm maximum gaps — too small for a child’s head or torso to pass, whether that’s the gap under the fence or between vertical rails.
- Non-climbable zone — a clear zone on the outside of the barrier, swept as an arc from the top of the fence: 900 mm for pools built from 1 May 2010, and 1200 mm for pools built 1994–2010. It removes the footholds a child would use to climb over.
- Latch release height — at or above 1500 mm a release needs no shield; a lower latch is allowed if it’s shielded and positioned to the standard. Either way it’s set beyond a young child’s reach.
Those numbers are deliberately conservative, for the obvious reason that the cost of getting child safety wrong is a drowning. None of it was ever calibrated to a cat or a 3 kg dog, which is where the gaps open up.
Where Pets Test Pool Barriers
On most jobs the owner’s first question isn’t about a child. It’s whether the fence will keep the dog out. The answer turns entirely on the animal, so it’s easier to take the common cases one at a time.
Small dogs and cats: the 100 mm gap
A 100 mm gap stops a child. It does nothing to a cat, and not much to a very small dog. Cats squeeze through openings a fraction of that, and a chihuahua or a miniature dachshund isn’t far behind. So a fence I’d sign off as fully compliant can still be a fence your cat walks straight through. How those openings are measured between uprights is its own topic, covered in our guide to vertical rail spacing. Owners often get the next bit backwards. If a gap actually measures over 100 mm, the pet angle is the least of the problems; that gap is a Form 23 fail on child-safety grounds before the dog even enters into it.
Larger dogs: digging under the fence
A medium-to-large dog can open up a hollow under a fence faster than most owners would believe. The 100 mm ground-clearance rule helps, but it assumes the ground stays put, and a determined digger doesn’t read the standard. Some owners run a solid skirt along the base to stop the excavation, which is reasonable enough. A skirt that’s set badly, though, can leave a fresh gap, or sit on loose fill that won’t hold. If you’re changing anything at the base of the barrier, get it checked at your next inspection before you rely on it.
Cats and the non-climbable zone
The non-climbable zone is built around a child’s reach. A cat doesn’t reach; it climbs, and it climbs almost anything. Clearing the NCZ does nothing to stop one. If keeping cats out of the pool area is the real goal, you’ll need to manage that some other way, because the barrier won’t get you there and was never meant to.
Birds and wildlife
Pool barriers don’t address birds, possums, or other wildlife at all. Those are pool-cover and pool-design questions, not barrier compliance.
Compliance Trade-Offs Pet Owners Weigh Up
Glass vs aluminium fencing
Frameless glass gives a pet nothing to grip, so it’s the harder climb of the two. The trade-off is cost, plus the water spots and nose prints that mean it wants cleaning more often than people expect. Tubular aluminium is cheaper and takes a knock better, but the verticals can hand a climbing animal a foothold the glass doesn’t. Both pass inspection. The choice comes down to your pets and your budget, not the standard.
Mesh or solid base for diggers
Owners of serial diggers often ask about a solid or meshed base. It can work. Whatever goes in still has to keep the fence inside the 100 mm ground-clearance rule and sit on ground that won’t shift, so don’t assume a weekend DIY add-on passes. Flag it at inspection and have it confirmed.
Latch type
A magnetic latch is effectively dog-proof. There’s nothing for a paw to push or pull. A gravity-drop latch with a thumb release is the weaker link; rarely, a persistent dog works it loose with teeth or a paw. For a gate that’s both pet-resistant and compliant, a magnetic latch set at the required release height does both without you having to choose between them.
Vegetation in the non-climbable zone
For child safety the rule isn’t negotiable: anything that offers a foothold stays out of the non-climbable zone — 900 mm for pools built from 2010, 1200 mm for 1994–2010 pools. The pet question is genuinely secondary. Clearing planting on the outside makes the pool visible, and whether that settles a dog or excites it depends entirely on the dog, so I’d let the owner judge that one. The order of priority isn’t in doubt, though. Get the child-safety clearance right first; treat the planting as a preference after that.
Pet Issues That Aren’t Compliance Issues
Some things matter for pets but never appear on a Form 23 inspection:
- Pool covers — a small dog can fall through a cover that would hold a child. Cover type and condition matter in a pet household.
- An exit point inside the pool — a dog that falls in can usually swim but may not find a way out. A ramp or shallow step helps.
- Water chemistry — chlorine and salt levels that are fine for people can irritate pets.
- Pool equipment — skimmer baskets and pump intakes pose entrapment risks to small animals that the barrier standard doesn’t cover.
The Bottom Line
A barrier that passes Form 23 keeps children out, and it keeps most large pets out as a bonus. It won’t reliably stop a cat or a very small dog, and it was never asked to. So if you’ve got small pets, run them as two separate jobs. Get the Form 23 right first. Then sort the pet side separately: tighter gap management, a cover that holds their weight, maybe some training. None of that shows up on the certificate, and it isn’t meant to.
For what a standard barrier check covers, see our pool compliance checklist, and for the climbing rule that trips up the most owners, our guide to the non-climbable zone.
FAQ
Does a compliant pool fence keep my dog out?
Usually, if it’s a medium-to-large dog. A Victorian barrier is built around child dimensions, and most larger dogs can’t get through a compliant 100 mm gap or over the height. Determined diggers and very small dogs are the exceptions.
Can cats get through a compliant pool fence?
Often, yes. Cats can fit through the 100 mm gaps that stop a child and can climb a barrier that was never measured against a cat’s reach. The standard doesn’t aim to keep cats out, so you’d need separate measures for that.
Can I modify my pool fence to be more pet-proof?
You can, but any change still has to meet AS 1926.1 — gaps under 100 mm, the required height, and a clear non-climbable zone. Have any base skirt, infill or hardware change verified at your inspection so a pet upgrade doesn’t quietly create a compliance failure. Re-lodgement after the re-check runs through your council, and the steps differ by area — see how it works in Wyndham City and Moorabool Shire.
Are pool covers and pet ramps part of a Form 23 inspection?
No. Form 23 assesses the barrier — height, gaps, the non-climbable zone, and the gate. Covers, in-pool ramps, water chemistry and equipment are pet-safety considerations outside the inspection.
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