French doors and sliding glass doors are two of the most requested features in Australian home renovations, and for good reason. They flood a room with light and open straight onto a deck, pool or garden. But from a security standpoint, they don’t behave like a normal front door, and treating them the same way is where homes go wrong. A hinged timber door with a deadbolt is fairly predictable to secure. A wide glass door built to slide or swing open needs a different solution.
Why French and Sliding Doors Are a Different Security Problem
Standard doors rely on a solid frame and a deadbolt driven into a strike plate. French and sliding doors are built around a large glass panel and a lightweight frame, with sliders running on a track rather than hinges. Most sliding doors are secured with a simple latch, not a deadlock, designed to stop the door drifting open in the wind rather than resist someone forcing it. French doors bring their own issue: two leaves meeting in the middle, often held by a bolt into the head and sill rather than a full-width deadbolt, giving an intruder two edges to work with instead of one.
What the Break-In Data Actually Shows
The latest Australian Bureau of Statistics Crime Victimisation data shows 2.1% of Australian households, around 217,600 in total, experienced a break-in in 2023-24, up from 1.8% the year before. Of households that experienced an attempted break-in, 40% reported a door or window damaged or tampered with, and 30% saw or heard someone trying to get in. That confirms what security professionals already assume: doors and windows are where an attempted break-in plays out, which is why the weakest door in the house, often the glass slider at the back, deserves the same attention as the front entrance.
French Doors: Two Leaves, Two Weak Points
Because French doors open outward or inward on hinges like a normal door, homeowners often assume they’re just as secure. The difference is in the middle join. Where a single door locks directly into a solid frame, French doors typically rely on flush bolts or a rod system at the top and bottom of the inactive leaf, and if that hardware is worn, poorly fitted or simply cheap, the whole join can be levered apart with a pry bar in seconds. The glass panels themselves are usually large, single-glazed and unprotected, which means even a well-locked pair of French doors can be bypassed by breaking a pane and reaching through to the handle.
Sliding Doors: The Track Is the Problem
Sliding doors have a different failure point: the track. Many older sliders can be lifted slightly and popped out of the track, bypassing the lock without breaking any glass. Others are vulnerable to being jemmied along the bottom rail, where a flat tool creates just enough of a gap to release the latch. A key-operated patio bolt helps, but it doesn’t change the fact that the glass and frame offer little resistance once someone is determined. This is the gap a genuine security screen, tested to the Australian Standard for security doors and screens, is designed to close, adding a mesh and frame barrier that has to be defeated before the door is even reached.
A Practical Fix: Security Screens Built for These Doors
The good news is that French and sliding doors don’t need to be replaced to be secured properly, they need the right screen fitted over them. Sydney home security solutions tailored to wide openings can cover a full set of French doors or a sliding track without blocking the light or view that made the homeowner choose them. For homeowners in the south-west, Canterbury Bankstown security doors installed to fit these wider openings are a practical option, since a local installer can measure the specific door style, whether it’s a two-leaf French set or a three-panel slider, and fit hardware designed for that configuration rather than a generic retrofit. Paired with a quality patio bolt or track lock, a properly fitted security screen turns the most exposed door in the house into one of its strongest.
French doors and sliding glass doors will always be a different security challenge to a standard front door, because the glass, the width and the ease of opening that make them appealing are the same things that make them easier to force. The fix isn’t to give up the light or the view, it’s to put a genuine barrier between that glass and the outside world, matched to the specific door it’s protecting.
Frequently Asked Questions
Are sliding doors really less secure than hinged doors?
Generally, yes. Most sliding doors rely on a latch rather than a deadbolt, and the track allows some doors to be lifted out entirely. A security screen or secondary track lock adds the resistance the latch alone doesn’t provide.
Do French doors need two locks instead of one?
Ideally yes. The inactive leaf should have flush bolts at the top and bottom in addition to the main lock on the active leaf, so an intruder can’t simply lever the two doors apart at the centre join.
Will a security screen block the view through my French or sliding doors?
Quality mesh security screens are designed to preserve sightlines and airflow. From a normal viewing distance, the mesh is barely noticeable, and the door still opens and closes as usual behind it.
Can I add a security screen to an existing sliding door without replacing the door?
Yes. Security screens are fitted over or alongside the existing door and track, so there’s no need to replace the sliding door itself, just to reinforce what’s already there.
Is a patio bolt enough on its own for a sliding door?
A patio bolt helps stop the door being lifted or slid open, but it doesn’t protect the glass itself. Pairing it with a security screen addresses both the track and the glass in one upgrade.