How do they work?
Made from a combination of materials, fire doors are constructed using a number of components. The door itself, the frame and the hardware attached to the door all help to act as a barrier to fire and smoke, preventing it spreading.
Doors have a fire rating, which establishes how long a door can resist fire before breaching. Complying with regulations, fire doors resist fire for a limited amount of time. The integrity of the door will be determined by the quality of the components involved.