Floor sloping under fire door (gap)

[JongoT]

We have a gap of more than 20mm under a fire door fitted by a carpenter. This should be a maximum of 10mm, less if the door has smoke seals.
The problem is our bedroom floor slopes slightly down to where the door closes (and correspondingly up to where it's fully open). The floorboards run parallel to the doorway. There is carpet either side.
Has anyone got any ideas as to how the gap can be solved without creating a trip hazard on the door threshold?

 

[freddiemercurystwin]

Slice a chunk off the carpenters head and fix that to the floor? Otherwise fit a sloping hardwood threshold. - see if BC will be happy with that, are BC involved? Or get the carpenter or whoever screwed to put it right at their expense.

 

[Deleted member 174758]

We have a gap of more than 20mm under a fire door fitted by a carpenter. This should be a maximum of 10mm, less if the door has smoke seals.

Thought that was now 4mm maximum

The problem is our bedroom floor slopes slightly down to where the door closes (and correspondingly up to where it's fully open). The floorboards run parallel to the doorway. There is carpet either side.
Has anyone got any ideas as to how the gap can be solved without creating a trip hazard on the door threshold?

If you cannot accommodate a 16mm thick threshold (which would need to taper away at both sides) the best solution might be a surface mounted drop seal. Should cost £20 to £30. TBH the joiner should have known about this

A drop seal fitted into the bottom edge of the door is possibly a neater idea, but takes a bit more kit and also a bit more skill to install

 

[^woody^]

Rising butt hinges