Home security
8 Proven Ways to Strengthen the Front Door of Your House
Australian homes are largely safe, but the Australian Institute of Criminology still records residential break-ins as one of the most common property offences reported to police. The front door is where most forced entries begin, and it is also the easiest weak point to fix. The eight upgrades below cover the whole door as a system: the leaf, the locks, the frame, and the way it is installed.
Why it matters
Strengthen the door as a system, not a single part
A thick steel leaf is useless if the frame splinters on the first kick. A high-security lock is pointless if a burglar drills straight through the cylinder. To make a real difference you have to think about the leaf, the locks, the strike plate, and the frame fixings together, and treat any upgrade to one part as a reason to check the others.
The list below is ordered the way a good installer would tackle the job: start with the physical barrier, then the locking hardware, then the structure holding it all in place, and finish with the trades and habits that keep it working.
The 8 upgrades that actually make a difference
- Choose a steel leaf at least 3 mm thick. For a genuine security door, the outer steel skin should be no thinner than 3 mm, with internal stiffening ribs and a mineral or foam core for rigidity and noise reduction. Timber-only doors, even solid hardwood, can be split with a heavy boot in a few seconds. If a full steel door is not an option, an internal steel liner bolted to the back of a solid timber door is a strong compromise.
- Install at least two locks of different types. One lock is one point of failure. Fit a mortice deadlock in the middle of the door and a separate rim or cylinder deadlock about a third of the way from the top or bottom. Use products that carry different resistance ratings, ideally tested to AS/NZS 4145 so that any single attack method, such as bumping or picking, only defeats one of them.
- Add armour plates over the lock cylinders. Cylinder drilling is one of the fastest forced-entry methods used in Australian break-ins. A hardened steel armour plate (also called a protector or escutcheon) sits over the cylinder and spins freely, so a drill bit cannot get a bite on it. Combined with an anti-bump, anti-pick cylinder this closes off the most common covert attacks.
- Fit a long, deep strike plate anchored into the framing. The strike plate is what actually catches the bolt, and standard 50 mm screws into the door jamb will pull straight out under a good kick. Replace it with a heavy security strike plate at least 250 mm long, screwed with 75 mm screws that reach the structural stud behind the jamb. Do the same on the hinge side.
- Reinforce the frame with large-diameter anchor bolts. Most standard door frames are pinned to the wall with a handful of small nails or short screws. For a security door you want at least six to eight anchor bolts per side, ideally 10 mm to 12 mm in diameter, driven deep into the surrounding brickwork or timber studs. This is the single biggest upgrade for kick and crowbar resistance, and it is the one homeowners most often skip.
- Upgrade hinges and add anti-lift pins. Three heavy-duty hinges are a minimum for a steel door, four is better. Use fixed-pin or welded hinges so the pins cannot be knocked out from outside. If your door opens outward, add hinge-side security bolts (also called dog bolts) that engage into the frame when the door is closed, so the door stays put even if the hinges are cut.
- Add a wide-angle viewer, chain, and smart sensor. A 180-degree door viewer or a video doorbell lets you see who is at the door without opening it, which quietly eliminates a large share of opportunistic entries. A door reinforcer chain or bar gives you a safe way to open the door partway. A magnetic contact sensor tied into your alarm or smart-home hub tells you the moment the door moves, whether you are home or not.
- Have it installed by a licensed professional. A perfect door with a bad install is still a bad door. In Australia, security work should be carried out by tradespeople licensed under your state or territory scheme, for example a NSW Master Locksmiths Association member or a Victorian licensed security installer. A pro will scribe the frame accurately, use the correct anchors for brick, block, or timber, and check that the leaf sits flush so the locks engage cleanly. That precision is what keeps the whole system working for the next twenty years.
Where to start
The three upgrades with the biggest payoff
If you cannot do everything at once, prioritise the changes that block the most common attacks in Australian residential break-ins: forced entry through the door leaf, cylinder drilling, and jamb splitting. In practice, that means a solid house safety door a serious lock package with armour plates, and a properly anchored frame.
- Steel leaf with reinforced core
- Two different locks plus armour plates
- Long strike plate and frame anchors into the studs
Why these three win on cost per unit of protection
A real steel leaf
Stops the kick-in attack, which police reports consistently list as the number one method for forced entry into detached and semi-detached homes.
Two locks with armour
Closes off drilling, bumping, and snapping at the same time. Different lock types mean no single tool set gets the intruder through both.
Anchored frame
Transfers force from the door into the wall structure, so a boot or crowbar meets brick and stud instead of a few short screws in soft pine.
The best security door in the catalogue is only as strong as the six screws holding its frame to the wall.
Habits
Small daily things that keep the upgrades honest
- Actually deadlock the door, even for short trips. A latch alone can be slipped with a card.
- Keep spare keys off the porch. Under the mat and inside the pot plant are the first two places checked.
- Rekey after moving in or after losing a key, rather than replacing the whole lock body.
- Light the entry. A motion-activated LED above the door removes the cover intruders rely on.
- Test the door twice a year. Bolts should throw fully with the door closed, hinges should not sag, and the strike plate screws should stay tight.
A quick word on Australian standards and insurance
When you shop for hardware, look for products tested to Australian Standards, in particular AS 5039 for security screen doors and AS/NZS 4145 for locksets. Many home and contents insurers in Australia offer premium discounts if your entry doors carry certified locks and, in some cases, if the doors themselves are compliant. It is worth calling your insurer before you buy: a short conversation can pay back the upgrade cost over a few years.
If your home is a rental or a strata property, check the by-laws or your lease before drilling into brickwork or replacing the frame. Most landlords and owners corporations will approve upgrades that improve security, but they usually want to see the spec first and use their own approved trades.
Frequently asked questions
How thick should the steel be on a proper security front door?
Aim for an outer steel skin of at least 3 mm, with internal stiffening ribs and a rigid core. Anything thinner starts to flex under a hard kick and defeats the point of a steel door. If you are retrofitting a timber door, a 3 mm steel liner bolted to the inside face is a reasonable middle ground.
Do I really need two locks on the front door?
Yes, and they should be of different types. A single lock is a single point of failure. A mortice deadlock plus a separate rim or cylinder deadlock, each with a different resistance profile, forces an intruder to defeat two independent mechanisms with two different tool sets.
Space the locks well apart on the door leaf so that a crowbar attack cannot compromise both at once.
What is an armour plate and is it worth adding?
An armour plate, sometimes called a protector or hardened escutcheon, is a steel disc that sits over the lock cylinder. Good ones spin freely so a drill bit cannot bite. Since cylinder drilling is one of the fastest and quietest forced-entry methods, an armour plate on each lock is one of the cheapest and highest-value upgrades you can make.
Can I install a security door myself in Australia?
You can, but in most cases you should not. Security work in Australia is regulated at the state and territory level, and warranty and insurance conditions often require installation by a licensed trade. A professional installer will also anchor the frame correctly into brick or studs, which is the part DIYers most often get wrong.
Will a stronger front door reduce my home insurance premium?
Often, yes. Many Australian home and contents insurers offer discounts for certified locks and compliant security doors. The saving varies by insurer, postcode, and policy, so ring your provider before you buy and ask which products they recognise.
How much does a full front-door security upgrade cost in Australia?
Prices vary widely by state, property type, and hardware brand, so any figure quoted online will be misleading. As a rough shape of the quote, expect three cost lines: the door leaf, the lock package, and the labour to install and anchor everything. Get at least two written quotes from licensed installers and make sure both quotes list the same standards and hardware, otherwise you are not comparing like with like.
What is the single most overlooked weakness on Australian front doors?
The strike plate and the frame fixings. Most builders use short screws into soft timber, which pull out under a good kick even if the door itself is solid. Replacing the strike plate with a long security plate screwed into the structural stud is often the single biggest improvement a homeowner can make in an afternoon.
Soccer lover, feminist, DJ, hand letterer and New School grad. Operating at the fulcrum of aesthetics and programing to create strong, lasting and remarkable design. Let’s make every day A RAZZLE-DAZZLE MUSICAL.