Door locks that meet Australian insurance

A lock is a small machine that has to satisfy three audiences who do not speak to each other: the household that wants one key, the insurer that wrote a clause in 2011, and the National Construction Code path that applies if the leaf is also a fire door or an access door. Most Australian entries fail the second audience while looking busy enough for the first.

I write this as a locksmith. The pattern is stable from a weatherboard in Wynnum to a brick veneer in Geelong. After the window is broken, the assessor photographs the lock, not the garden lighting. The rest of the hardware we publish sits next to this piece. The lock is the one that can void a claim.

What insurers mean by a deadlock

Household policies in Australia are not identical. Plenty of the larger ones still use language inherited from the old deadlocking habit: accessible external doors should be fitted with a deadlock, or with locksets that meet nominated parts of AS 4145. “Accessible” usually means a door a person could walk to without a ladder — front, back, side, laundry, the sliding door onto a low deck.

A deadlock, in the trade, is a lock whose bolt can be thrown so that the outside handle or cylinder will not retract it. A nightlatch that you can open with a credit card, or that unlocks when you turn the inner knob, is not that product. A passage set is a handle. A privacy set is a bathroom.

The clause is a way for an underwriter to say: we expected you to make the obvious doors slow to open. If the thief used a brick on the sidelight, the lock may not matter. If they walked in through a snibbed screen and a nightlatch, you will have a conversation. Ask for the wording. “Insurance grade” is not a standard.

AS 4145, without the brochure fog

AS 4145 is the Australian Standard for locksets. It is a family, not a sticker. Different parts cover mechanical locksets, cylinders, and related furniture. Ratings speak to durability, corrosion, and attack resistance. A cylinder that meets a higher attack rating is harder to pick, drill or snap than a $12 barrel from a tub at the hardware barn.

What you want on a quote is not the word “compliance”. You want:

• The lock type — mortice deadlock, rim deadlock, multipoint with a genuine hook or bolt, or a lockable sash on a slider.
• The relevant AS 4145 part and rating the maker claims.
• The cylinder type, and whether it is restricted.
• The furniture finish, specified for the same atmosphere as the rest of the opening.

A lock body can be honest and the cylinder cheap. A cylinder can be restricted and the keep held by two 20 millimetre screws into pine. Specify the set.

On a unit entry that is also a fire door, the lock has to stay in the tested family under AS 1905.1. Read the hardware schedule before anyone opens a router.

Mortice, rim and the Australian habit

The ordinary Australian timber entry still takes a 60 millimetre backset mortice. The lock sits in the thickness of the leaf. A deadlock function, a latch for daily closing, and a cylinder or two on the faces. This is the product most assessors recognise without a seminar.

Rim deadlocks sit on the inside face. They are the retrofit of a century of nightlatches. They work. They look like a retrofit. On a Federation four-panel they can be the least destructive way to add a bolt that insurers will photograph. On a contemporary slab they look like an afterthought, which they are.

Sliding doors need a lock that hooks or bolts into the jamb. A snib in the handle is not a deadlock. Patio bolts help a French pair; they are not a substitute for a lock on the active leaf.

Multipoint locks — a central gearbox throwing bolts or hooks at head, mid and sill — are common on imported timber, uPVC and better aluminium entries. They can be excellent, or a cheap gearbox with a cylinder no Australian insurer has heard of. Ask which standard the gearbox was tested to, and keep spare parts in the country.

Keying alike, master keying and restricted keyways

Keying alike means several cylinders open on the same key. Front, back, laundry, security screen, the gate if you insist. It is the most useful thing a locksmith does for a household that is tired of a bowl of strangers.

It is not a security upgrade. If the front cylinder is a supermarket barrel, five matching supermarket barrels is five copies of a poor idea.

Master keying is a hierarchy. Cleaners get the laundry. You get everything. It belongs in a block of units, and only sometimes in a house. Every master system is a compromise in the pins. Draw the chart.

Restricted keyways are the adult version of “don’t copy this at the grocer”. The blank is controlled. That does not make the lock unpickable. It makes casual copies harder, which is most of the domestic problem. Pair a restricted cylinder with a body that deserves it, and write down who has keys.

Smart locks, and the caveats that survive the app

A smart lock is a motor or a solenoid on top of a mechanical story. The mechanical story still has to work when the battery is flat, the Wi-Fi is sulking, or the vendor has retired the bridge.

Insurance clauses are written for keys and deadlocks. Some insurers now mention electronic locks. Many do not. The safe specification is a rated mechanical deadlock that can be thrown without the app, plus electronics if you want them. A handle that unlocks on Bluetooth and has no serious bolt is a convenience product.

Other caveats, from jobs that come back: fire doors cannot take an untested retrofit; access doors have opening-force limits; coastal cylinders fill with salt and electronics dislike the same verandah; codes are keys, and they expire. If the leaf is your only exit from a bedroom, it must open from inside without a phone.

I fit smart locks. I will not fit one as the only lock on an accessible door whose policy still says deadlock.

Salt, humidity and the cylinder you forgot

Locks fail from weather as often as from attack. A peninsula or a canal estate will tea-stain a cheap zinc rose and seize a pin tumbler that was never oiled. 316 stainless furniture, or a PVD or powdercoat the maker rates for marine air, belongs on the same list as 316 screws. Graphite or a dry lock lubricant is kinder than a kitchen oil that becomes a gum.

Humidity swells a timber stile until the bolt drags. If the door is moving, fix the moisture before you buy a heavier bolt.

Bushfire overlays add ember seals and, on some BAL levels, metal screens. Do not drill a larger cylinder hole through a BAL-rated rebate because a smart lock needed a wider rose. Heritage overlays complicate the furniture: a chrome keypad on a Victorian four-panel will get a letter in some streets and a wince in all of them. A rim deadlock on the inside face is usually the calmer path.

A specification that will survive a claim

Write it down as if an assessor will read it, because one might.

• Deadlock function on every accessible external door, including sliders, or the exact alternative your policy names.
• AS 4145 ratings on the lockset and cylinder, quoted by part, not by vibe.
• Restricted keyway if casual copies worry you; keying alike for the doors you actually use.
• Furniture and fasteners in the atmospheric class of the site — 316 or a rated coating near surf.
• Screens locked, not theatrical. A rated screen in front of an unlocked nightlatch is a porch decoration.
• Smart functions as extras on a mechanical lock you can still key.
• Fire, access and BAL constraints read before the router comes out.

A lock that looks busy and does not deadlock is a prop. Insurers photograph props.

Fit hardware you will use. A restricted cylinder left on the snib every afternoon is a paperweight with a nice key. The security screen that actually works is the same argument in mesh: the lock you throw is the product.