Types of Gate Latches Explained: How to Choose the Right Latch for Every Fence and Gate Application
The gate is only as good as the latch. You can invest in a premium fence and a solid gate, but if the latch isn't matched to the application, you're going to have problems: gates that swing open in the wind, latches that stick, pool gates that fail compliance, or heavy double gates that sag and bind.
This guide breaks down every common type of gate latch, what it's built for, and how to pick the right one for your fence.
Bolt Latches
A bolt latch (also called a slide bolt or barrel bolt) is the simplest gate latch: a cylindrical steel bolt slides horizontally into a strike plate fixed to the gate post. It's reliable, low-maintenance, and available in sizes from 75mm (light garden gate) to 300mm (heavy industrial gate).
Best for: Side access gates, garden gates, driveway gates where manual operation is preferred. Not suitable for pool gates (it requires deliberate manual engagement and does not self-latch).
Gravity Latches (Spring Latches)
A gravity latch uses a pivoting arm or a spring-loaded mechanism to automatically engage when the gate swings closed. The most common version in Australian pool fencing is the thumb-lift latch, which automatically drops into a catch when the gate closes. It can self-latch from either side and is widely used in pool fence applications.
Best for: Pool fence gates (AS 1926.1 compliant when positioned at 1500mm height), light to medium-duty residential and commercial gates. Look for stainless steel versions for longevity in outdoor conditions.
Double-Sided / Two-Way Latches
A two-way latch is operable from both sides of the gate, making it suitable for gates in a shared boundary where access is needed from both directions. It uses a through-bolt or dual-arm mechanism that engages the same strike plate regardless of which side is operated.
Best for: Boundary gates between properties, pedestrian access gates in commercial fencing where staff need to enter and exit from either side, shared driveway access gates.
Heavy-Duty Gate Latches
For large, heavy steel gates used in industrial, warehouse, or commercial applications, standard gravity or bolt latches are not enough. Heavy-duty latches are constructed from thicker steel, use larger strike plates, and are often weld-on to avoid the flex that occurs with bolt-on hardware on heavy gates.
Best for: Double steel gates, warehouse entry gates, heavy swing gates on commercial estates, machinery access gates. Specify weld-on if the gate frame allows it for maximum rigidity.
Magnetic Latches
Magnetic latches use a powerful magnet in the gate stile to engage a steel strike plate on the post, pulling the gate into the closed position. They are silent, low-maintenance, and work well on aluminium or light-gauge steel gates.
Best for: Aluminium blade panel gates, garden gates, light residential applications. Not recommended for heavy or exposed applications where wind loading is significant, as the holding force of a magnet can be overcome.
Double Gate Drop Bolts
For double (bi-parting) gates, one leaf is typically held stationary with a drop rod that sinks into a socket in the ground (or a socket in the header for covered openings). The other leaf latches to the fixed leaf. Drop bolts are not a latch in isolation but are an essential component of any double gate system.
Best for: All double gate installations. Without a secure drop bolt on the passive leaf, the gate pair cannot hold position against wind loading or manual pressure.
Pool-Compliant Latches: What AS 1926.1 Requires
For pool fence gates, the latch must meet AS 1926.1 requirements. The two compliant options are:
- A latch positioned at or above 1500mm on the pool side of the gate, inaccessible from the outside.
- A child-resistant latch (requiring two simultaneous actions to release) positioned below 1500mm.
The gate must also self-close from any open position and self-latch without manual assistance. See our pool gate latch guide for a full breakdown of compliant products.
Matching Latch to Gate Material
| Gate Material | Recommended Latch Type | Notes |
|---|---|---|
| Aluminium tubular | Gravity / magnetic / bolt | Avoid heavy weld-on latches on lighter aluminium frames |
| Steel tubular (light) | Gravity / bolt / two-way | Weld-on or bolt-on both suitable |
| Steel (heavy duty) | Heavy duty weld-on bolt / drop bolt | Bolt-on hardware can loosen over time on heavy gates |
| Chainwire | Chain latch / bolt through post | Latch attaches to post, not mesh |
| Double gate (any) | Drop bolt + single leaf latch | Drop bolt on passive leaf is always required |
Further reading
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Frequently Asked Questions
What type of gate latch is required for a pool fence?
Under AS 1926.1, the gate latch must be either positioned at 1500mm or above on the pool side (out of reach of small children from outside), or it must be a child-resistant latch requiring two simultaneous actions to open. The gate must also self-latch from any open position without manual assistance.
What is a two-way gate latch and when do I need one?
A two-way latch is operable from both sides of the gate. It's needed when people need to pass through a gate in both directions and you cannot reasonably reach over or around the gate to operate a single-sided latch. Common applications include shared boundary gates, commercial pedestrian access gates, and internal building access.
Can I use a magnetic latch on a pool gate?
Generally no. Magnetic latches do not satisfy the self-closing and self-latching requirements of AS 1926.1 unless specifically tested and certified to the standard. The holding force of a standard magnetic latch can be overcome by wind, reducing its reliability as a safety barrier. Always use a gravity latch or child-resistant latch on a pool gate.
What is a drop bolt and why do I need one on a double gate?
A drop bolt (or drop rod) is a steel rod that drops into a socket fixed in the ground to hold one leaf of a double gate stationary. Without it, wind loading or pushing on the gate causes the two leaves to flex and open independently. One leaf is held fixed by the drop bolt; the other leaf latches to the first leaf.
Should I use weld-on or bolt-on gate latches?
For light to medium-duty gates, bolt-on latches are perfectly adequate and easier to replace. For heavy-duty steel gates, weld-on latches provide a more rigid connection and eliminate the risk of bolt holes loosening over time under repeated loading. If your gate is over 30kg or sees frequent use, weld-on is the better choice.
What material should I choose for an outdoor gate latch?
For outdoor applications, stainless steel (316 grade for coastal environments, 304 for inland) or hot-dip galvanised steel provides the best corrosion resistance. Zinc-plated or mild steel latches will rust quickly in outdoor conditions, particularly in humid or coastal areas. Powder-coated finishes add aesthetics but rely on the underlying material for corrosion resistance.
How do I stop a gate from swinging open in the wind?
A gravity latch or spring-loaded latch will automatically engage when the gate closes, preventing wind from holding it open. For heavier gates, a hydraulic gate closer (combined with a latch) ensures the gate always returns to the closed and latched position. Make sure the latch is correctly adjusted so it fully engages on closure.
Can I retrofit a new latch to an existing gate?
Yes, in most cases. Bolt-on latches can be fitted to any gate with a suitable frame. Weld-on latches require a welder but provide a more permanent solution on steel frames. For pool fences, confirm the replacement latch is AS 1926.1 compliant before installing it.
Browse gate latches for every application.
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