In new doorsets, the seal is rebated into the head and jambs of the door frame, and is aligned with the centre of the door edge. Where IF30 Intumescent Fire Seal is fitted to an existing door assembly, the top rail and stiles of the door are easily rebated. The intumescent fire seal is interrupted at the hinges and lock/latch plate positions, and protection at these points is normally not essential for FD30 doors (see BS 8214).
