Window safety


An increasing number of children are admitted to hospital each year, with serious injuries, as a result of falling from windows and balconies. These falls often occur in the child's own home, over the warmer months when families leave windows and doors to balconies, open both during the day and at night.

Children aged from one to five years are most at risk, as they are naturally curious, but lack the ability to recognise danger.

How may a child be injured?


  • Children may fall out of windows if they are able to climb on furniture to reach the window, or if they are jumping or playing on a bed near an open window.
  • Injuries resulting from children falling from windows range from cuts and bruises to head injuries, broken limbs and even death.

How common are these injuries?

On average, each year 10 children are admitted to The Children’s Hospital at Westmead (CHW) after falling from a window. Almost all of these children fall from a window in their own home.

Of the children who have presented to CHW, approximately:

  •  80% were under 5 years of age;
  •  80% had fallen more than two metres;
  •  80% had significant or severe injuries;
  •  3 out of 5 cases admitted to hospital were boys;
  •  50% of these falls were associated with furniture near the window.

Children can fall out of a window which is open more than 12.5cm, even if a fly screen is present.

Is there a Law or an Australian Standard to prevent window falls?

The Building Code of Australia states, that where a person, including a child, could fall through an openable window located more than four metres above a surface below, a balustrade or barrier must be constructed. The barrier or balustrade, which may be constructed as the wall beneath the window sill, or a fixed window pane, among other solutions, must be constructed with a height of not less than 86.5cm above the floor beneath the window. The code also states that any opening in the barrier must not allow a 12.5cm sphere (round ball) to pass through it.

The Strata Schemes Management Regulation 2010 (NSW), states that all strata buildings in NSW must be fitted with devices that enable their windows to be locked at 12.5cm when the devices are in use. This law applies to openable windows that have sills less than 1.7m above the inside floor and which are more than 2m above the ground floor outside. Devices must be able to withstand an outward force of 250N. Owner’s corporations must have devices installed on all common property windows above the ground floor by 13 March 2018.


  • Window latches, locks or guards should be fitted to stop windows opening more than 12.5cm or to protect the window opening (see Kids Can’t Fly Window Safety Product Guide).
  • Where possible, all windows above the ground floor should not be opened more than 12.5cm.
  • All windows should have window locks/latches fitted to stop them opening more than 12.5cm, or guards should be installed to protect the opening.
  • Where possible, open windows from the top.
  • Beds and other furniture should be kept away from windows, so that children cannot climb up to windows.
  • Children should be taught to play away from windows.
  • Children should always be supervised.
  • Do not rely on flyscreens to prevent a child from falling out of a window. Falls Prevention Warning labels are available for purchase via the Australian Window Association:

The Children's Hospital at Westmead recommends a maximum opening of 12.5cm for windows and balustrades. Please note, while there are no laws that require window and balustrade openings in older buildings to meet current building standards, for the safety of children we recommend the fitting of child safety devices that are childproof and tested for their strength and durability.