I understand that the gap between a fire door and its frame should be 3mm. If smoke seal is fitted is the 3mm between the brush and the door, if not the door will not close. What should the gap be below the fire door?
We have a fire escape door opening to the outside. It is fitted with a panic bar set and outside override. Can a deadlock be fitted for security reasons? is so should it be fitted with a thumb turn cylinder?