Getting experienced subbies to follow site rules without a standoff

Every supervisor has met him. Thirty years on the tools, knows more about his trade than anyone else on site, and has seen safety rules come and go. He is not reckless — he is experienced. And that experience is exactly why the standard approach to enforcement often fails with him. You can quote the Act, you can point to the site rules, you can threaten to send him off site, and he will still do it his way the moment your back is turned.

The problem is not that experienced subbies do not care about safety. It is that they have a finely tuned sense of what is real risk and what is paperwork. When a rule seems disconnected from the actual hazard, they treat it as an obstacle to be worked around. Your job is not to win an argument about who knows more. Your job is to get the behaviour you need without turning every correction into a standoff that costs you the cooperation of the whole crew.

This article is about influence and holding the line. It is not about documentation systems or the legal duties of a principal contractor — those are covered elsewhere. It is about the human side of supervision: how to read a subbie, how to correct without humiliating, and how to escalate when you have to.

Why experienced trades resist site rules

An experienced subbie has a mental model of risk built over decades. He knows which tasks actually hurt people and which ones mostly generate paperwork. When a rule does not map onto that model, he does not see it as safety — he sees it as someone covering themselves. The resistance is not usually about the rule itself. It is about the implication that he does not know how to manage his own work.

There is also a commercial dimension. Subbies are paid for output, not for compliance. Every minute spent on a rule they consider unnecessary is a minute not spent earning. If you cannot explain how the rule prevents a real harm on this site, you are asking them to lose money for no reason they can see. That is why ‘because it’s the rule’ fails with this group. It gives them nothing to work with.

The supervisor’s leverage is not authority. It is the ability to connect the rule to a consequence they respect. That might be a prosecution, a serious injury, or simply the fact that the principal contractor will shut the site down. The trick is to make the connection specific to the task in front of them, not a generic warning about safety.

Set the standard on day one, not after the first incident

Experienced subbies read a site quickly. In the first hour they work out what is actually enforced and what is just written down. If they see someone else ignoring a rule without consequence, they will file that rule under ‘optional’. If they see the supervisor pick up a piece of rubbish or fix a guard, they will file that under ‘expected’. Your behaviour in the first days sets the ceiling for the whole job.

That means you cannot afford to let a small breach slide because the subbie is under pressure or because you do not want the confrontation. The first time you walk past an unguarded edge or a missing tie-off, you have taught everyone on site that the rule is negotiable. The correction does not need to be dramatic. It needs to be immediate and calm. ‘Mate, I need you to clip on for that one’ said quietly is enough, as long as you say it every time.

Consistency is the single most powerful tool you have with experienced trades. They can live with rules they disagree with if the rules apply to everyone, including your own crew. What they cannot tolerate is a supervisor who enforces hard on Monday and looks away on Friday. That is when you lose their respect, and once that is gone, you are back to arguing about everything.

Correct the behaviour, not the person

The fastest way to turn a cooperative subbie into a problem is to correct him in front of his crew. Experienced trades have standing to protect. If you make them look like they do not know their job, they will fight you on principle even when they know you are right. The correction might be justified, but the cost is high: you lose the willing cooperation that makes the rest of the job easier.

Take the conversation aside. Be specific about the behaviour, not the person. ‘I need that edge protected before you start’ is a task instruction. ‘You should know better’ is a personal attack. The first one gets the guard up. The second one gets an argument about your attitude. The same principle applies to paperwork and site rules: frame it as what needs to happen, not as a character flaw.

It also helps to ask a question before you give an instruction. ‘How are you planning to manage the fall risk on that section?’ gives the subbie a chance to tell you his method. Often it will be sound, and you can simply confirm it. If it is not, you can point out the gap without implying he is careless. The conversation stays on the work, where it belongs.

Explain the why, not just the what

When you ask an experienced subbie to change how he works, he will immediately assess whether the change is worth it. If you cannot explain the mechanism of harm — how the injury actually happens — he will assume there is no real risk and go back to his old method. This is where a supervisor who understands the hazard has a huge advantage.

Take silica. An experienced concreter or renderer may have been cutting without suppression for years and never had a visible problem. Telling him to use water or extraction because ‘it’s the rule’ will not land. Explaining that the fine dust stays in the air and gets deep into the lungs, and that the damage accumulates over years without any warning, is a different conversation. It connects the control to a real consequence he can picture. You can point him to the WHS duties for silica on the Safe Work Australia site if he wants to read more, but the explanation has to come from you first.

The same applies to electrical safety. A subbie who has been on tools for decades may have a healthy disrespect for low-voltage work because he has never been shocked. Explaining that the risk is not the shock itself but the fall from the ladder when it happens, or the fact that a fault can energise a whole frame, makes the isolation procedure feel less like bureaucracy. Safe Work Australia’s electrical safety guidance is there for the detail, but your job is to make it relevant to the task he is about to start.

Use the subbie’s own expertise against the risk

Experienced subbies often have better practical solutions than the ones in the SWMS. If you treat them as a problem to be managed, you miss that. A better approach is to bring them into the risk assessment for their own task. Ask them how they would control the hazard if it were their call. You will often get a method that is safer and faster than the generic one, because they know the actual conditions.

This does not mean letting them set the standard. You still have to hold the line on the non-negotiables — falls from height, electrical isolation, silica controls, and anything that could kill someone. But within those limits, there is usually room to adjust the how. When a subbie has shaped the method, he owns it. He will follow it because it is his, not because you imposed it.

The line to hold is the outcome, not the procedure. If the outcome is that no one falls, no one gets electrocuted, and no one breathes dust, you can be flexible about how you get there. Experienced trades respect a supervisor who knows which parts are fixed and which parts are open to discussion. They lose respect for one who cannot tell the difference.

When to stop the task and escalate

There will be times when influence fails. A subbie refuses to follow a critical control, or keeps reverting to an unsafe method after you have explained the risk and agreed on an alternative. At that point you are no longer managing behaviour; you are managing a risk that could hurt someone. The line is clear: if the control is critical and the subbie will not apply it, the task stops.

Stopping work is a big call. It costs money, it delays the programme, and it will make you unpopular. But tolerating a critical breach is worse. It tells everyone on site that the rule is optional, it exposes you personally, and it exposes the principal contractor. If you are not sure whether the breach is critical, ask yourself what the worst credible outcome is. If the answer is a fatality or a life-changing injury, stop the task and escalate.

Escalation means telling the principal contractor and, if necessary, the subbie’s own boss. It is not about punishment. It is about making sure the decision is made above your pay grade and that everyone understands the consequence. Do it calmly and factually. ‘We agreed on the control, it was not applied, and I have stopped the task until it is resolved.’ That is a sentence no one can argue with.

Worked example: the concreter who would not wear a harness

A builder in western Sydney was running a two-storey addition. The concreter was a sole trader with decades of experience, well liked, fast, and reliable. On the first day of formwork for the upper slab, he was working near the edge without a harness. The supervisor mentioned it. The concreter said he had been doing it this way for years and the edge was not that high. The supervisor let it go because he did not want to lose the concreter’s cooperation on a tight programme.

Two days later, the concreter was still working the edge without a harness, and now his offsider was doing the same. The supervisor realised he had set the standard on day one: the rule was optional. He pulled the concreter aside and asked how he would manage the edge if it were his own house. The concreter shrugged and said he would just be careful. The supervisor explained that the risk was not the fall itself but the landing — that from that height, a fall onto the formwork or the slab below would likely end his career and possibly his life. He also pointed out that the concreter’s own insurance would not cover him if he was found to have ignored a known control.

The concreter still did not want to wear a harness. He said it slowed him down. The supervisor offered an alternative: a temporary edge protection system that could be installed and moved as the formwork progressed. It cost more and took time to set up, but it meant the concreter could work at his normal speed without clipping and unclipping. The concreter agreed. The supervisor ordered the edge protection, and the job finished without incident. The lesson was not that the concreter was reckless. It was that the supervisor had to find a control that the subbie would actually use, and then hold the line on it.

Building a site culture that experienced trades respect

Experienced subbies talk to each other. If your site has a reputation for being fair but firm, you will get better trades applying to work for you. If it has a reputation for being inconsistent or for letting things slide, you will get the ones who want an easy ride. Culture is not built through posters or toolbox talks. It is built through hundreds of small interactions where you either enforce the standard or you do not.

That does not mean being heavy-handed. The best supervisors are the ones who can have a laugh with the crew and still stop the job when it matters. They are respected because everyone knows where the line is. The subbie might not like being pulled up, but he will respect you for doing it consistently. And when he moves to his next job, he will remember that your site was one where the rules meant something.

If you want to sharpen your approach, the guide to how NSW builder CPD works explains how to structure your learning around the areas that matter on site. You can also browse the PointCPD course catalogue for short courses on supervision and safety culture. For a deeper look at the legal framework that sits behind your decisions, see the article on ladder safety on site. And if you are bringing on new workers, the site induction checklist will help you set the standard from day one.

Holding the line without burning the relationship

The core skill is separating the behaviour from the person. You can like a subbie, respect his work, and still stop him from doing something unsafe. In fact, the more you respect him, the more clearly you need to hold the line, because letting him slide is a form of disrespect. It says you do not think he can handle being corrected.

When you correct, be specific and be brief. Say what needs to change and why. Then move on. Do not lecture, do not bring up past mistakes, and do not make it personal. If the subbie pushes back, listen to his reasoning. He might have a point. If he does not, restate the requirement and the consequence. If he still refuses, stop the task. That is the sequence, and it works because it is predictable.

Over time, you will build a reputation as someone who is fair but immovable on the things that matter. Experienced subbies will not necessarily thank you for it, but they will work with you. And the ones who cannot accept it will self-select out, which is a good outcome for everyone.

Questions builders ask

• Site Safety
• Subcontractors
• Supervision

Published 22 September 2026. General information for builders, not legal, financial or engineering advice for a specific job. Check current requirements with the relevant regulator or standard before relying on them.