Jersey regulation change means all rooms to have smoke alarms
Smoke alarms will have to be fitted in all rooms in a house or flat under new building guidelines.
The regulations apply to any new building or extension started in Jersey after 1 January 2013.
Under the previous regulations smoke alarms only had to be fitted in circulation spaces such as hallways.
Jason Masterman from the fire service said closed doors offer protection but make it difficult to hear alarms in other rooms or hallways.
He said: "Even more dangerous is the fact that if the fire originates inside the bedroom, the closed door will keep the smoke from reaching and activating the detector if it is installed outside the room".
The guidelines also highlight places that should be fitted with sprinklers, such as residential care homes, and basement car parks.