The Real Question Is Not "How Many" — It's "How Well"

Walk into any door showroom and the sales pitch converges on one number: locking points. Three points, five points, seven points — as if security were a simple count. The truth is more nuanced. An aluminum glass exterior door resists forced entry through the interaction of the lock, the hook bolts, the shoot bolts, the strike plates, the frame, and the glass. A cheap five-point system can be less secure than a well-built three-point system.

But the number is not meaningless. Multi-point locking spreads the clamping force along the entire sash edge, which does three concrete things: it stops the door from being pried open at the latch corner, it holds the door square so the gaskets seal evenly (keeping the door watertight and thermally efficient), and it resists wind load deflection on large door leaves. For a tall aluminium glass door — often 2.4m or higher — a single-point latch at mid-height leaves the top and bottom corners virtually unprotected.

"We asked three suppliers for a 'high-security entrance door'. One quoted a 7-point system with a 1.2mm steel lock case. Another quoted 3 points with a 2.5mm case and hook bolts on every point. The second door is the stronger product — and it cost less." — Architect, villa project, Auckland

What the Locking Points Actually Do

The points work together as a system. When you lift the handle, the gearbox drives all points simultaneously: hook bolts swing behind the strike plates on the hinge side, shoot bolts drive into the head and sill keepers, and the deadbolt extends into the main strike. The frame must carry matching strike plates — a common failure is a strong lock fitted to a frame with flimsy sheet-steel strikes that bend under load.

How Many Points for Which Door Type

Beyond the Count: What Actually Makes a Door Secure

When comparing aluminum glass exterior doors from Chinese factories, look past the point count at five load-bearing details:

1. Hook bolts vs plain shoot bolts. Hook bolts physically wrap around the strike, defeating the most common prying attack. If a "5-point" system uses five straight bolts with no hooks, it is not the security upgrade the number implies.
2. Lock case steel thickness. A quality gearbox uses 1.5-2.5mm hardened steel. Thin cases flex and can be defeated by a screwdriver twist at the cylinder.
3. Strike plate anchorage. Strikes should be screwed into the frame with M5+ hardware and reinforce the frame section behind them — not just surface-mounted into soft aluminium.
4. Hinge-side security. Prying attacks target hinges. Look for fixed hinge pins (non-removable) or hinge-side security studs that engage when the door closes.
5. Glass specification. A fortress lock on a 6mm annealed glass door is theatre. For genuine security, specify laminated or tempered-laminated glass — the glass is often the weakest link in a forced-entry test.

Grades and Standards: The Objective Shortcut

From Spec to Installed Door: The Security Chain

Rogenilan Windows Doors, a Foshan manufacturer exporting to Australia, Europe, and the US, supplies aluminum glass exterior doors with 3 to 7-point locking from SIEGENIA, ROTO, or HOPO, configured by door height and security grade. Prototype burglary-resistance testing to EN 1627-30 (RC2/RC3) and AS5039 can be arranged, and every door ships with a hardware schedule listing points, hook configuration, and strike anchorage — so the security claim is documented, not implied.

2026 Indicative FOB Prices by Security Configuration

Prices are indicative 2026 factory FOB ranges for project volumes (50+ doors), excluding freight. Final quotation depends on size, hardware brand, glazing, finish, and certification documents. Contact Rogenilan Windows Doors for a specification-matched quote.

Multi-Point Locking FAQ

Is a 5-point lock always better than a 3-point?

Not automatically. Five points on a cheap gearbox with thin steel and no hooks can be weaker than three points with a 2.5mm case and hook bolts. Evaluate the hardware grade, hook configuration, and strike anchorage first — then use the point count as a tiebreaker for door height.

Do I need a multi-point lock on a door with a fingerprint reader?

Yes. The smart lock replaces the cylinder and handle, but the multi-point gearbox underneath still provides the actual security. A fingerprint reader on a single-point lock is a smart lock on a weak door. Specify the gearbox and reader together as one package.

Can aluminum glass doors achieve burglar-resistance certification?

Yes. Aluminum exterior doors with reinforced sash sections, hook-bolt multi-point locking, laminated glass, and properly anchored strikes routinely achieve EN 1627-30 RC2 and RC3. The aluminum frame is not a limitation — the glazing and hardware package decide the grade.

Why do premium hardware brands matter for security?

Because the gearbox is a precision mechanism. Established brands like SIEGENIA, ROTO, and HOPO use hardened steel components, consistent tolerances, and corrosion-resistant finishes, and they back the hardware with published load and cycle data. Off-brand gearboxes save $30-50 per door and can fail at the exact moment security matters most.