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[Garbla]

We are seeking clarification regarding the provision of Child-Proof Locks to certain windows in residential flat buildings.

We are intending to install key operated window locks on our double-hung windows which will be mounted to limit the window opening to 12.5cm or less as required. If there is only one window in a room we understand the need for the installation of a child proof lock. Where there are a number of windows in a room (eg. a bay window comprised of 3 double hung windows) is it necessary to install a child proof lock to all 3 double hung windows or only one? 

Consider the scenario where each double hung window is fitted with a standard keyed lock (lock & keeper fitted to the meeting rails) which operates only when the window is fully closed. When these windows are closed and key locked then it appears to us that the child proof requirement is satisfied as the opening is limited to 0mm. Only one window is required for ventilation and that window will be fitted with a child proof lock limiting the window opening to 12.5cm when children are present. So do we need to fit all 3 double hung windows with a locking device which allows the window to be locked at maximum 12.5cm open? We do not think so given that two windows can be key locked in the fully closed position. What is your opinion?

We are in NSW.

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