Plenty of building owners treat anchor point installation like painting a fence: job done, tick the box, move on. But anchors aren’t a “set and forget” item. They’re life-critical safety devices sitting on a roof, dealing with sun, salt, rain, heat, wind and vibration every single day. The day they’re commissioned is the day they start ageing.
If you’re a facility manager, building owner or body corporate rep, you’re a PCBU under WHS law. That means you have a duty to provide and maintain safe systems of work. Installation is the start of that duty, not the end of it.
What does AS/NZS 1891.4:2025 require?
You’ll often hear it boiled down to “every anchor legally has to be load tested every 12 months.” It’s a tidy line. It’s also not quite right.
The updated standard sets a clearer framework for periodic inspection, maintenance, and traceability. A 12-month formal inspection cycle is the baseline for permanently installed fall-arrest anchors. But what happens during that inspection depends on the type of anchor, how it’s fixed and what paperwork exists:
- Single-fix anchors, such as chemically bonded eyebolts or expansion anchors fixed into concrete or masonry, rely on one fixing. These need physical proof-load testing at recertification.
- Multi-fastener anchors, such as baseplates riveted or screwed into metal sheeting or purlins, may not need a pull test every year. That only applies when the right manufacturing criteria are met, and the original installation documentation is available. Without that, visual and structural inspection alone isn’t enough.
So the real message isn’t “test everything annually.” It’s “inspect everything annually, and know exactly what you’ve got.” Harnesses, lanyards, and other soft gear follow their own formal six-monthly inspection cycle, so it’s worth keeping the two schedules separate.
What you can’t see can hurt you
An anchor can look fine from a metre away and still be compromised. Rooftops are tough environments, and the damage is often hidden:
- Galvanic corrosion happens when dissimilar metals touch in the presence of moisture. Stainless baseplate on zinc-coated sheeting with no isolation gasket? The roof sheet can slowly sacrifice itself around the fixings, leaving thin, weak metal that shears under load.
- Crevice corrosion develops in the tiny gaps under baseplates, seals and washers. Water sits there, oxygen runs out and pitting starts, completely out of sight.
- Stress corrosion cracking can affect high-tensile stainless components in coastal atmospheres. Microscopic cracks grow quietly, then the part fails suddenly with no obvious warning.
Thermal cycling can loosen expansion anchors in concrete. Chemical anchors can degrade through moisture, heat build-up and pollutants. On metal roofs, wind uplift can gradually enlarge fixing holes, so the sheet loses its ability to hold a fall load.
An untrained eye won’t pick any of this up, but a competent inspector will know where to look, and when to test.
How roof works can also cause problems
Roofs are rarely static; you might add solar arrays, HVAC units, walkways, or undergo re-roofing. Every one of those changes can undo the original design.
If you have sloped or slippery roofs, a single lanyard may not cut it. A second independent connection point or passive protection like guardrails may be needed. Any time the roof changes, the height safety system should be reviewed. Don’t wait for the next annual visit to find out your layout no longer works.
Paperwork is a safety asset
Documentation sounds boring until an inspector can’t find it. A proper handover pack includes as-built layouts, anchor specs and batch certificates, substrate load approvals, installation test records and a maintenance register. Together they tell an inspector what was installed, what it was rated for and how it was proven.
Lose that, and things get expensive. If an inspector finds a multi-fastener anchor on a metal roof with no layout, no structural sign-off and no batch cert, they can’t just wave it through on a visual check. They can’t verify what’s under the baseplate or what was originally tested. In practice, that can mean proof-load testing, engineering reassessment, replacement, or a red tag reading “DO NOT USE.”
What happens if an anchor has arrested a fall?
In this situation, the point needs to come out of service straight away. Lock it out, tag it and don’t let anyone clip on again. Fall forces can deploy energy absorbers (once used, they’re done), bend eyebolts, elongate fixing holes, shear rivets and micro-crack concrete, even when the anchor looks perfectly intact. Getting it back into service means replacing affected units, checking adjacent fixings, re-verifying the load path and getting updated certification.
Slapping a new tag on it and hoping for the best isn’t an option, and the liability if something goes wrong later is serious.
Your system is only as good as who’s using it
You can have a fully certified anchor system and still be exposed if the wrong people get on the roof with the wrong gear. A sensible access process looks like this:
- Permit to work: Roof access is controlled, not casual.
- Pre-use checks: Before clipping on, workers check the tag is current, markings are legible, and there’s no visible corrosion, loose fixings or deformation. The annual inspection doesn’t replace this.
- Verified competency: Contractors should hold recognised training for working at heights and understand system limits, swing falls and clearance requirements.
- A rescue plan: If someone falls and can’t be retrieved quickly, suspension trauma becomes a real risk. A site-specific rescue plan isn’t optional.
Anything with corrosion, deformation, a missing tag or doubtful paperwork gets locked out and red-tagged until it’s sorted.
How often should roof anchor points be inspected?
You don’t need a complicated program to understand this; you just need a repeatable one. Build a central register of layouts, certificates, sign-offs and test reports, and flag the gaps. Run a 12-month inspection cycle with certified height safety technicians, and a separate six-monthly cycle for harnesses and soft gear.
Review after any roof change, and use permits, competency checks, pre-use inspections and a rescue plan every time. Chat with the experts at Abseilers United about roof anchor recertification and make sure you have anchor points you can rely on.