Hi, I live in a Victorian detached house with a loft conversation. I am about to extend our back reception/garden room with a single-story extension with the usually bi-fold doors (no kitchen just a room). Our architect said I must use a fire resistant door from hallway into this room because we have a loft conversation. Is this a legal requirement as the room will not contain a kitchen and there are 3 external doors on the ground floor and a Juliet balcony with external doors on the first floor which offer several fire escape routes? Thank you in advance.