On 05/07/2019 16:43, Harry Bloomfield wrote:
Andrew formulated the question :
It's the door at the bottom of the stairs that needs to be a fire
door, and closed when you go to bed, so you have a safe exit route
down to your front door.

I don't have a door at the bottom, the hall/ stair is open, connecting
living room and kitchens with their own doors.

That would worry me.

Can you still completely shut off the kitchen from the rest of
the house ?. If so I would make an effort to keep that door
shut at night.

A smoke detector at the bottom of the stairs (plus elsewhere)
will warn you the moment any smoke starts to come up the stairs,
but tbh, the best escape route is down an enclosed staircase
and straight out of the front door, especially when you are
no longer 'agile'.

Commercial and other public buildings sometimes have fire
curtains, like non-flammable roller blinds that drop down
to stop smoke and hot gases from travelling up stairwells
and the like, where physical fire doors are not possible.