Fire Doors

This video shows the how a Howdens fire door is fitted to an existing door frame

Fire door installed to meet fire regulations

Building regulations require a safe means of escape from a converted loft.
How fire will be inhibited is considered along the extent of the exit route.
Fire resistant doors and partitions (for open-plan designs) are one option to achieve this and if chosen are needed along this route. An alternative method is to install sufficient smoke alarms.
It is difficult to modify existing internal doors to meet the current fire safety specification as fire doors are insulated to protect from heat and fire.
This 'integrity' is specified in minutes eg 20 or 30 that the door needs to resist fire.
Different time limits are given for different types of property and the use property is put to.
Fire doors don't usually have to be self closing unless they are onto a garage, where smoke control is also required.
Door hinges need to have a melting point of at least 800 degrees Centigrade, i.e. have steel washers.
In most cases it is possible to retain the existing door frame.
Being thicker and heavier than existing doors the frames may need stops recessed or replaced, and fixings reinstalled.
The operating gap between frame and door needs to be kept to a minimum (3-4mm).