Do Security Doors Actually Deter Break-Ins? Here’s What the Data Says

Most of us have had the thought, usually late at night or after hearing about a neighbour’s break-in. Is my front door actually going to stop someone? It’s a fair question. And it turns out the answer isn’t just a gut feeling. There’s real data behind it.

Let’s look at what the research actually shows, and what it means for your home.

How Burglars Actually Choose a Target

Before we talk about doors, it helps to understand how most break-ins happen in the first place.

The common image of a burglar is someone with a plan, watching the house, waiting for the right moment, bringing tools. But that’s largely a myth. Research published by the Australian Institute of Criminology (AIC) found that more than half of all burglaries (57.8%) were spontaneous and unplanned. The offender saw an opportunity and took it..

That same AIC study, which surveyed actual burglary offenders as part of the Drug Use Monitoring in Australia (DUMA) program, found that two-thirds of offenders (66.2%) entered properties through unlocked doors or windows. Not by kicking down a reinforced door or drilling through a deadbolt. Through a door that simply wasn’t secured.

This is the single most important thing to understand: most break-ins aren’t about beating your security. They’re about finding a home that doesn’t have any.

Where Burglars Get In

The AIC research is consistent with broader break-in data. According to statistics compiled by takeatumble.com.au drawing on AIC data, the most common points of entry in Australian break-ins are:

• Unlocked doors, 40%
• Broken doors or windows, 35%
• Unlocked windows, 28%
• Picked or broken locks, 20%

Put those numbers together and a clear picture forms: the majority of break-ins happen because a door or window wasn’t secured, or because the door gave way under force. These are exactly the two things a quality security door is designed to address.

So, Do Security Doors Actually Work?

The short answer is yes, and the reason comes back to that word from earlier: opportunity.

Because most burglars are acting on impulse and looking for the easiest possible entry, anything that slows them down or signals difficulty tends to make them move on. The AIC research found that security screens, grilles, and alarms were specifically cited by offenders as effective deterrents. When a burglar sees a reinforced door with a steel mesh screen, heavy-duty frame, and quality locks, they’re looking at a property that will take time and effort to enter, and time is the one thing an opportunistic burglar doesn’t want to spend.

This brings up what security researchers often call the “two-minute rule.” Most residential burglars will abandon an attempt if they can’t get inside within roughly two minutes. A standard hollow-core door can be forced in seconds. A properly installed security door with a multi-point locking system is a completely different proposition.

The Numbers on Visibility

It’s not just about physical resistance. Visible security measures change a burglar’s decision before they ever touch the door.

Research cited by Oz Roller Shutters, drawing on Australian security data, indicates that homes with visible security doors are significantly less likely to be targeted. Burglars surveyed consistently report that the sight of reinforced doors, screens, and cameras leads them to move on to another property.

This matters because deterrence happens in two stages. First, the visible presence of security signals that this home is not an easy target. Second, if someone does try to force entry, the physical strength of the door gives them a real barrier to overcome, one that makes noise, takes time, and dramatically increases the risk of being caught.

How Common Are Break-Ins in Australia?

If you’re wondering whether this is even a real risk worth investing in, consider the scale of the problem.

A 2024 survey by Budget Direct, one of Australia’s major insurers, found that nearly 8% of Australian participants had experienced a break-in or attempted break-in in the preceding 12 months. That’s a meaningful proportion of households, and it doesn’t account for the emotional impact that a break-in has on families, the loss of the sense of safety at home that many victims describe.

Australian Bureau of Statistics data also shows that in 2020–2021, an estimated 3.5% of Australian households experienced either a break-in or an attempted break-in, with a further 4% experiencing malicious property damage. Given that Australia has approximately 10 million households, those percentages represent hundreds of thousands of families affected in a single year.

After experiencing a break-in, the Budget Direct survey found that 43% of Australians immediately added or changed locks on their doors and windows. It’s a predictable response, but it raises an obvious question: why wait?

What About Security Screens?

Security screens, the mesh panels fitted over doors and windows, often get overlooked in favour of alarm systems and cameras. But they deserve more attention.

Home Grail’s analysis of Australian burglary data found that while nearly 90% of Australians lock their doors and windows, only 54% use security screens. That’s a significant gap, given that windows account for a substantial share of break-in entry points.

A quality security screen (look for products that meet Australian Standard AS 5039) is not the same as a standard fly screen. It’s a tested barrier designed to resist cutting, impact, and being levered out of its frame. Combined with a security door at the front and back of your home, it closes off most of the entry points an opportunist burglar is looking for. Not sure which screen suits which window? Our room-by-room security screen guide breaks it down.

What Security Doors Can’t Do Alone

It’s worth being honest here. A security door is one part of a broader picture. The AIC research found that the most commonly cited deterrent among surveyed burglars was, perhaps surprisingly, a dog. Alarm systems, sensor lights, and neighbours who notice unusual activity also ranked highly.

Security doors work best when they’re part of a layered approach:

• Physical barriers, security doors and screens on all entry points
• Locking habits, consistently locking up even for short trips
• Visibility, sensor lights, clear sightlines, and tidy landscaping that removes hiding spots
• Alarms and cameras, which add detection and evidence on top of physical deterrence

The research is consistent: no single measure eliminates risk, but visible, physical barriers reduce it substantially, particularly against the opportunistic break-ins that make up the majority of residential burglaries in Australia.

The Bottom Line

The data supports what most of us already sense: a quality security door makes your home a harder, less appealing target. It buys time, signals resistance, and closes off the entry points that most burglars rely on.

Given that two-thirds of Australian break-ins happen through unlocked or easily forced doors and windows, fitting a security door isn’t about preparing for a worst-case scenario. It’s about addressing the most common one. Ready to look beyond the front door? Security upgrades for each room cover the rest of the house.

If you’re weighing up the investment, start with the front door and back door, the two most commonly targeted entry points, and look for products certified to Australian Standard AS 5039, which sets the minimum requirements for security screen doors and window grilles. From there, your installer can help you assess where the remaining gaps are.
The research is detailed. Burglars look for the easiest way in. Make your home look like hard work, and most of the time, they’ll find somewhere else to go. Curious which common claims about security doors actually hold up? See our take on security door myths.