Window Lock Installations & Restricted Key Systems: Extra Security for North Shore Homes

Most North Shore homeowners think about their front door when it comes to security, but windows are just as often the point of entry — and the one most commonly left unsecured. Lock, Stock & Barrel Locksmiths fits window safety devices and restricted key systems across the North Shore, and the two work well together as part of a broader home security upgrade.

Window Safety Devices: An Often-Overlooked Entry Point

A window safety device is a lock or restrictor fitted to a window that either prevents it from being forced open or limits how far it can open — enough for ventilation, not enough for entry. They’re particularly relevant for ground-floor windows, sliding doors, and any window within reach of a fence line, balcony or garage roof. Beyond security, restrictor-style devices also serve a child-safety purpose on upper-floor windows, which is worth factoring in for family homes.

We fit window safety devices suited to the window type — sliding, awning, casement or louvre — since a solution that works well on one style won’t necessarily suit another.

Restricted Key Systems: Stopping Unauthorised Copies

Where window locks control who can get in, a restricted key system controls who can get a key cut in the first place. It works by patenting the key profile, so blanks are only available through an authorised locksmith rather than any hardware store or key-cutting kiosk. This matters most for households that have handed out keys over the years to tradespeople, cleaners, or previous tenants, and want a clean way to reset who holds legitimate access. We’ve covered restricted key systems in more detail in our dedicated guide, including how the authorisation process works day to day.

What a Home Security Assessment Covers

Rather than treating windows, doors and keys as separate jobs, we walk through the whole property to identify the points most worth securing first — usually ground-floor and easily-reached windows, sliding doors, and any external door where keys may have been handed out over the years without a clear record of who still holds one. From there, we can recommend a mix of window safety devices and, where relevant, a restricted key system, prioritised by what will make the biggest difference for your household rather than a one-size-fits-all package.

This kind of assessment is a common starting point for North Shore homeowners renovating, moving in, or simply reviewing security after a number of years in the same home.

A Combined Approach for North Shore Homes

Window safety devices and restricted key systems address two different weak points — points of entry and points of key control — and combining them gives a more complete picture of a home’s security than either measure alone. We work with homeowners across the North Shore to assess both at the same time, so recommendations are based on the whole property rather than a single door or window.

Frequently Asked Questions

Do window safety devices stop a window being smashed?

No — window safety devices secure the opening mechanism, not the glass itself. They’re designed to stop a window being forced or slid open, which is how most opportunistic entries happen, rather than to prevent glass from being broken.

How does a restricted key system stop unauthorised copies?

The key profile used in a restricted system is patented, meaning blanks aren’t stocked by general hardware stores or key-cutting kiosks. Copies can only be authorised and cut by a locksmith registered to that key system, giving the property owner control over who can obtain a key.

Can window safety devices be fitted to existing windows?

Yes, most window safety devices can be retrofitted to existing aluminium or timber windows without replacing the window itself. The right device depends on the window type, which we can confirm during an on-site assessment.