If people work on or near the roof of your building, you're responsible for keeping them safe and Australian law backs that up. But the rules can feel like a wall of code numbers and jargon. This guide breaks down the two standards that matter most, AS 1657:2018 and AS/NZS 1891.4:2025, so you know exactly what height safety compliance means for your property.
What does "height safety compliance" actually mean?
Height safety compliance means your building has the right safety systems in place and the paperwork to prove it, so that anyone working at height is protected from a fall.
Working at height is one of the most dangerous things people do at work in Australia. Falls cause serious injuries and deaths every year. Because of this, building owners and managers have a legal "duty of care": you must provide a safe place for anyone working on your site, whether they're your staff or a contractor.
If a tradie steps onto your roof to fix an air conditioner, that roof has become a workplace and the safety obligations are yours to manage.
AS 1657:2018 vs AS/NZS 1891.4:2025 — what's the difference?
The simplest way to understand it: AS 1657:2018 covers the safety systems built into your building, while AS/NZS 1891.4:2025 covers the personal equipment a worker wears and uses.
Think of it like driving a car:
- AS 1657:2018 is the road, lane markings and guard rails — the fixed things that keep you safe as you move around.
- AS/NZS 1891.4:2025 is your seatbelt — the personal equipment that protects you if something goes wrong.
Side-by-side comparison
|
AS 1657:2018 |
AS/NZS 1891.4:2025 |
| What it covers |
Fixed access systems built onto the building |
Personal fall-protection equipment |
| Think of it as |
The safe path and barriers |
The safety gear you wear |
| Examples |
Walkways, guardrails, fixed ladders, stairs, platforms |
Harnesses, lanyards, anchor points, static lines |
AS 1657:2018 is the standard for fixed platforms, walkways, stairways and ladders. These are the permanent structures that let people get around your roof safely — for example, a walkway with handrails leading to air-conditioning units.
This is sometimes called "passive" protection because it works on its own once it's installed correctly.
AS/NZS 1891.4:2025 is a multi-part standard for industrial fall-arrest systems and personal equipment. It sets the rules for harnesses, lanyards, anchor points and the lines workers clip into.
This is active protection because a person has to wear it and use it properly for it to work.
Most buildings need a mix of both. A well-designed roof might have AS 1657:2018 walkways to move around safely, plus AS/NZS 1891.4:2025 anchor points for areas where a worker still needs to clip on.
Why both standards matter for your building
Meeting both standards is what real roof safety compliance looks like. Ticking one box and ignoring the other leaves a dangerous gap.
If your building only has anchor points but no safe way to reach them, workers are exposed while they move. If it has walkways but no anchors near the edges, they're exposed when they lean out.
Both standards exist because falls usually happen during these in-between moments.
There's a business case too. Compliant systems help you:
- Stay on the right side of the law and avoid fines and legal trouble that come with Work Health and Safety (WHS) breaches.
- Protect people by reducing the chance of a serious accident.
- Keep work moving, because contractors can't (and shouldn't) start a job on a roof that isn't safe.
Where does rope access fit in?
Rope access is a method, not a standard. It's the technique trained technicians use to reach tricky spots by abseiling on ropes.
Some parts of a building simply can't be reached by a walkway or ladder, like the side of a high-rise or an awkward roof section.
Rope access lets qualified workers get there safely and efficiently, often without the cost and disruption of scaffolding. It still relies on the same height safety principles, including solid anchor points, the right personal equipment and proper certification.
It sits alongside AS 1657:2018 and AS/NZS 1891.4:2025 rather than replacing them.
How do I know if my building is compliant?
The only reliable way to know is to have your systems checked by a qualified specialist through a height safety audit.
An audit involves an expert physically inspecting your roof and access systems, comparing them against the current Australian Standards, and identifying anything that's missing, worn out or installed incorrectly.
You get a clear report showing where your roof safety compliance stands and what needs fixing.
As a general rule, systems should be checked at least once a year. Buildings near the coast often need more frequent checks because salt in the air speeds up rust and corrosion on metal anchors and fixings.
Sky5's height safety audit and compliance service covers all of this:
- The inspection
- A plain-English report with colour-coded risk levels
- A clear plan to bring anything non-compliant back up to standard
Quick answers
Does this apply if my building isn't a high-rise?
Yes. Any building where people access the roof needs safe access and fall protection.
Do these rules apply to residential homes?
They mainly apply to workplaces. But if you hire a contractor to work on your home's roof, that area becomes a workplace and you take on safety responsibilities.
Can old systems still be compliant?
Sometimes. Existing systems can often be inspected and certified if they still meet the standards. An audit will tell you for sure.
The bottom line
Height safety compliance comes down to two jobs working together:
- Safe ways to move around (AS 1657:2018)
- Reliable personal protection (AS/NZS 1891.4:2025)
Getting both right protects the people on your roof and protects you as the building owner.
If you're not sure where your building stands, a professional height safety audit is the simplest place to start. The team at Sky5 Queensland can inspect your site, explain what they find in plain terms, and help you close any gaps.
