What to look for in a security door

Plenty of doors look strong. Fewer actually stop someone determined to get in. Here's what to check before you buy.

The Australian Standard

In Australia, security screen doors are covered by AS 5039, with testing set out in AS 5041 and installation in AS 5040. A door that meets these has been tested against things like impact, knife shear and pulling the mesh. Ask whether the door you're quoted meets them.

The mesh or grille

Woven stainless steel mesh gives a clear view. A diamond grille is a good-value option. Ordinary fly mesh on its own is not a security door.

How the infill is held

The mesh needs to be clamped or screwed firmly into the frame. If it's only held by a rubber spline, it can be pushed out.

The lock

A triple lock holds the door at three points. A single lock can be enough for side doors, but front doors benefit from more.

The installation

A great door fitted badly is a weak door. It should be fixed into solid framing, with hinges that can't be removed from outside.