Can I Extend a Fire Door? Kitchens, doors, rails, stud, tables, chairs, stair cases, garden furniture etc... Find answers and ask questions here!

[joffski]

If a fire door is too short for the opening, can a timber fillet be planted on the top or bottom and the
door still maintain its integrity

[thedoctor]

It depends entirely on the composition of the existing door and frame. A fire door is not just the door, it is a way of closing an entire opening to stop or delay the passage of flame and smoke. The time varies with fire doors from 30 mins protection to 1 hour protection in domestic situations and sometimes these doors are simply solid timber but with intumiscent strips around them which expand in the heat to stop smoke getting through. Without knowing exactly how the existing door and frame are constructed it's not possible to advise properly. Sorry.