Report Door liner requirements in Fire Doors and Accessories Posted November 5, 2019 4 hours ago, Neil ashdown said: If the door leaf is new with installation instructions or an existing door leaf with a manufacturers label, you can check to find out the door frame sectional size and material requirements, hinge and hinge position requirements, intumescent seal requirements, fixing requirements (these should also be contained within the door frame kit) and fire stopping requirements. Smoke seals may likely be required too. Hi Neil, From what I’ve found out today, the fire door leafs were installed around 5 years ago. They hung the new fire doors on the existing frames which were standard doors originally so I’m assuming these existing frames are not fire rated. i was sent out to B&Q and purchased a FD30 frame. It has no instructions with it. I’ll check the leafs tomorrow for the manufacturers label and see what I can find out. thanks for your help!