Approved document b fire safety volume 1 dwelling houses defines an inner room as a.
Room within a room fire safety.
If you have a basement this is the most ideal location for a safe room if you are concerned about tornadoes or other storms with high winds.
The safest place for a safe room is underground.
A small room reception cupboard or toilet may be sited within the enclosure of an escape stair if the fire risk is considered low and all other parts of the building served by the escape stair have at least one other escape route.
An inner room poses a serious fire risk because if a fire starts elsewhere in your home there s no escape route available and you could get trapped.
According to uk fire safety regulations for offices every single office building must have a fire risk assessment carried out within the previous 12 months.
A first floor interior room is also a good location.
If there are 5 or more people employed in the office then the fire risk assessment must be written down.
Building a new wall to subdivide a room or create a new room can affect the means of escape from fire.
The situation you describe of an inner room is mentioned in the both adb and the dclg fire safety guides.
If you re building or refurbishing your home and the work changes the layout of your property you must comply with building regulations and this is especially relevant if you re creating.
So therefore these will basically be a room within a room effectively saying there will be no wall within the unit which adjoins the main ceiling of the unit for the exception of the boundary walls to sides front and rear.
Single direction of escape out of room and along a corridor before a choice of escape routes becomes available.
Single direction of escape within a room before a choice of escape routes one of which goes through a fire door into another compartment.
If in doing so a situation is created whereby the route for leaving an existing or new room is only possible through another room then an egress escape window from the existing or new room inner room will be needed as well as possibly one or more smoke alarms.
Know the best place to build or create a safe room.