If your fire door has a gap larger than 1/8 inch, it is not code compliant. For both top and vertical gaps, up to 3/8 inch, use a Top Protector System and a Vertical Edge Protector System for Wood Doors.
For fire door gaps larger than 1/8 inch on the latch side, use the Crown Vertical Edge Protector System for Wood Doors. If latch engagement is an issue, add the Crown Latch Protector.
Clearances greater than 1/8 inch on wood fire doors are excessive, therefore non-compliant. For gaps up to 3/8 inch at the top of your fire door, use our Top Protector System for Wood Doors.
Gaps of up to 1", at the center of paired wood doors, can be eliminated using our Vertical Extension. Choose the product that matches your door and hardware type.