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Home security is rarely one single product. It is layers working together, good lighting, clear sightlines, strong doors, smart habits, and secure windows that are harder to force, harder to break, and harder to tamper with quietly.
It is also worth saying this upfront. There is no such thing as a window that makes a home “unbreakable”. Security is about reducing risk, slowing entry, and making a break-in louder and more difficult, so most opportunistic attempts stop early.
One of the strongest starting points is double glazed windows, because you are not relying on one thin sheet of glass and a basic latch. You are combining two panes in a sealed unit, stronger hardware options, tighter sealing, and better overall build quality. In many homes, this may support better security, temperature control, and noise reduction, and may reduce common issues like draughts and rattles over the long term, depending on the specification and installation.
This window security guide explains which window styles can be more secure, and why. It also covers the security features that matter more than the opening style, plus practical checks you can do at home.
Before comparing window types, it helps to define what we mean by secure. A secure window usually does four things well.
That means the sash does not flex easily, the frame holds shape under load, and the hardware does not pop open with a screwdriver.
Many break-in attempts are not movie-style silent cutting. They are fast, messy attempts to smash, pry, or rattle something loose. Glass choice, thickness, and interlayers can change how quickly someone can make an opening.
A lock that looks solid but only grabs in one small point can fail under leverage. Security may improve when window locks engage in multiple places, such as with multi-point locking, plus robust keeps, hinges, and strike zones.
Even excellent windows can be compromised by poor fixing, gaps, weak packers, or rushed finishing, which is why window installation checks matter. The best window security is a system, not just a product.
Window style matters, but these features often matter more.
Multi-point locks secure the sash to the frame at several points, not just one. It is one of the most effective upgrades for resisting prying because the force is spread along the edge of the sash.
Where it helps most
Glass selection should match risk. Laminated safety glass can hold together after impact, which may make it harder to create an entry hole quickly. Toughened glass is strong, but when it fails, it breaks into small pieces, which can still allow access if someone can clear the opening.
A practical approach that many homeowners take
Windows often fail at the hardware points, not the glass. Strong hinges, reinforced fixing points, and well-fitted keeps reduce the chance of a sash being forced off square.
Security is not just about locking. It is also about how far a window can open safely for ventilation without creating an easy entry point. Restrictors can be useful in bedrooms, children’s rooms, and upper floors.
A window that seals well usually has less play. Less play means fewer leverage points for prying tools. It also supports comfort benefits people may notice, like reduced draughts and improved noise reduction with well-sealed double glazed windows.
Here is the honest answer. Several window styles can be very secure when specified well. The best choice depends on where the window is located, how accessible it is from outside, and how it needs to function day to day.
Tilt and turn designs are often a strong performer in security because the locking system can engage around the sash, and the hardware is designed to control movement in two modes.
Why they can be hard to force
Where they suit
Casements can be very secure, and double glazed casement windows may support this because they close into the frame and can be paired with multi-point locking. In real homes, they also suit areas where you want full airflow without a wide opening on a track.
Why they can be secure
Where they suit
Security watch-out
Casements rely on hinge integrity and lock quality. Cheap hardware or worn hinges can create movement that a prying tool can exploit. The fix is usually better hardware, correct adjustment, and proper maintenance checks.
Awning windows, including double glazed awning windows, can be a smart security choice because they do not open wide in the same way some styles do. Even when open, the geometry can make it harder for someone to climb through.
Why they can work well
Where they suit
Fixed windows do not open, so they remove one common weak point. Their security mainly comes down to glass choice, frame strength, and installation.
Why they can be secure
Where they suit
Important note
Fixed windows still need the right glass spec. If a fixed panel is at ground level and easily reached, laminated glass is often worth discussing.
Double glazed sliding windows can be secure, but they often depend more on details like lock engagement, panel play, and installation. Tracks and rollers matter too.
How to make sliding windows more secure
Where they suit
Security watch-out
Some older sliding windows can be vulnerable to lift and slide attacks if the panel can move vertically in the track. Modern well-fitted systems can address this, but it is something to check.
Bay and corner windows are not a “window type” so much as a configuration. Security comes from consistent specs across every panel.
What to focus on
Arches, circles, and custom shapes can be very secure when built as fixed glazing or paired with secure operable sections nearby.
Key points
A lot of residential break-ins happen through the easiest opening, which is often a door panel near the backyard or side path. If you are upgrading windows for security, it is smart to think about doors in the same project.
Secure door styles often include
What to prioritise for secure doors
Homeowners often start with security concerns, then notice the comfort benefits more day to day.
With modern double glazed windows and doors, some households may notice improvements like
Security is one reason to upgrade, but it is rarely the only benefit you end up keeping.
If you want a secure home without making it feel like a fortress, these steps are usually a good starting point.
Walk your home perimeter and ask
These are the locations where stronger locking and laminated glass tend to matter most.
With the window closed and locked, gently push and pull the sash. A small amount of movement is not unusual, but obvious rattle or flex can indicate worn hardware, misalignment, or an older system that is easier to pry.
If you like fresh air at night, consider window types or hardware that allow restricted ventilation, like tilt mode, awning openings, or restrictors. It reduces the temptation to leave large openings unsecured.
Even the best windows benefit from
It is usually cheaper and cleaner to build security in from the start, with the right lock type, glazing spec, and opening control.
Glass matters, but most forced entry attempts target leverage points. Hardware choice and installation quality are often the difference between “easy” and “not worth it”.
Two windows can look similar in a brochure but have completely different lock strength, hinge quality, and glazing build. Ask what is included, and ask where the locking points engage.
Back and side access points often need the strongest hardware, and that is frequently where sliding or hinged doors sit.
The most secure residential windows are not defined by one opening style. They are defined by the full system, strong sealing, robust hardware, locking that engages in more than one point, glass that suits the risk level, and installation that leaves no easy leverage gaps.
If you want a simple shortlist that works well in many Australian homes
For homeowners comparing options, APS Double Glazing typically encourages looking at security and comfort together, because the best choices often improve both. When the window system is well specified, you are not just reducing break-in risk. You are also building a home that feels quieter, holds temperature longer, and asks for less ongoing maintenance.
Disclaimer: This guide provides general information only. No window is completely “burglar-proof,” and results can vary depending on glass selection, hardware, installation, and how the home is secured overall. Always consider safe exit routes and any local safety requirements when adding security measures.
The most secure windows are usually the ones that combine double glazed windows with the right security specification, meaning strong hardware, minimal sash play, and locks that engage in more than one place. In practical terms, well-specified tilt and turn, casement, awning, and properly engineered sliding windows can all be secure, especially when paired with multi-point locking and security-focused glass choices.
Windows that are easy to access and hidden from view, such as ground-floor windows near side paths, fences, or shrubs, can be a practical risk point, which is why hardware and glass choice can matter even if your doors are strong.
They usually hate anything that increases time, noise, and the chance of being noticed. Visible security measures, unpredictable lighting, clear sightlines, and harder-to-force windows and doors can all push an opportunistic attempt onto an easier target.
“Burglar-proof” is a strong word, because most things can be forced with enough time and tools. What you can do is make windows high resistance, with multi-point locks, reinforced hinges and strike areas, restricted opening options for ventilation, and laminated safety glass in higher-risk locations (because it tends to hold together better after impact).
Often, yes, because newer systems may have tighter tolerances, better sealing, more robust locks, and improved hardware compared to older, worn windows. That said, security depends on the specification and installation, not just age. A poorly installed new window can be less secure than a well-maintained older one.
Tinting and security film get confused a lot. Standard tint is mainly about glare and privacy, and it can reduce visible light indoors or change nighttime visibility from inside. Some films can also complicate glass break patterns and may not deliver meaningful security unless the film is specifically designed and installed as a safety or security-grade product.
Sometimes, yes. If a lock only grabs in one small point, or the window has enough play to be pried, forced, or lifted, a “locked” window can still be attacked. Security improves when locking points are robust, well-fitted, and supported by a sash that cannot flex easily.
It can help, but it is not foolproof, especially if the lighting pattern looks unnatural or never changes. Security professionals often recommend motion-sensor lighting and smart or timed lighting that mimics real use, rather than a single light left on constantly.
A more realistic goal is “harder to break into than the next house.” Focus on layered security, solid door hardware, secure windows and locks, lighting and visibility, and habits like closing and locking. If you add cameras or sensors, make sure they are visible and supported by good physical security rather than used as the only measure.
Entry points can vary by home layout and opportunity, but windows and doors near side or rear access are often treated as priorities because they can be easier to approach unseen.
There is no guaranteed “safe hiding spot.” Many break-ins are quick searches for obvious valuables, so reducing temptation is usually more reliable than clever hiding. Keep high-value items out of sight from windows, avoid leaving packaging for expensive items visible, and think about what can be seen through your glazing at night.
They may deter some opportunistic behaviour, but evidence is not conclusive, and outcomes vary by property layout and how visible the device is. A doorbell camera is generally stronger as part of a wider setup, including lighting, locks, and sensible window and door security, rather than a standalone solution.
There is not one single “number one” that works everywhere. In practice, deterrence usually comes from a combination of visibility, lighting, and credible risk of detection, paired with physical barriers that take time to defeat.
Costs vary widely based on window size, number of windows, bar design, whether they are fixed or hinged for egress, and installation complexity. Bars can also create fire safety and escape risks if poorly planned, so it is worth getting professional advice before treating them as a default solution.
Curtains can help by keeping valuables out of view, which reduces temptation. The trade-off is that fully closed curtains during the day can sometimes signal nobody is home. Many households use a balanced approach, privacy where needed, but not making the house look permanently shut up.
Bars can increase resistance, but they are not always the best first step, especially if you care about street appeal, ventilation, emergency egress, or resale. In many homes, upgrading to stronger window systems, better locks, restricted ventilation options, and laminated glass in high-risk areas can improve security without the downsides of bars.
In normal residential products, “unbreakable” is not realistic. Even very strong glazing can be damaged with enough force. The more useful question is how long the window resists and how hard it is to make a usable opening.
Not in a practical, real-world sense. You can buy very high-resistance glazing systems, but they are designed to resist attack, not to be impossible to break.
They can be, if you are upgrading anyway and you have higher exposure, such as ground-floor side access, secluded rear areas, or repeated local incidents. For many households, the best value is a smart specification, strong locks, tight sealing, and laminated glass in targeted locations, rather than paying for extreme “security-rated” upgrades everywhere.
No glass is fully burglar-proof, but laminated safety glass is often chosen where slowing entry matters, because it can hold together after impact, which may make it harder to create an opening quickly.
Ballistic glazing is a specialist product with engineered frames and installation requirements, and it is typically priced well above standard residential double glazing. The cost depends on the threat level rating, glass thickness, frame design, opening type, and structural support. If someone is considering it, it is usually a bespoke consultation, not an off-the-shelf “window upgrade.”
They are designed for different jobs. “Gorilla Glass” is a chemically strengthened glass brand commonly used in phones and devices, not standard building windows. “Tempered” is called toughened glass in Australia, and it is widely used in buildings for safety compliance, but for burglary resistance, laminated glass is often preferred where slowing entry matters.
They can sometimes break it, yes, but it can be harder and noisier than single glazing, especially when the system is well-built and uses security-focused glass choices. If security is the main concern, double glazing paired with laminated glass and strong locking hardware is usually a more meaningful step than relying on “double glazing alone.”
To improve window security without overdoing it, start by identifying higher-risk areas such as ground-floor or hidden windows and those near climbable objects. Upgrade to reinforced or multi-point locking systems and consider laminated safety glass where access is easy. Make sure sliding sashes cannot be lifted or rattled, add hardware that allows secure ventilation, and support windows with good exterior lighting. Finally, check nearby doors at the same time so security is consistent across the opening.