Internal doors for a flat , do they have to be fire doors?

[borndigital]

Hello - I am trying to figure out whether the internal doors I intend to replace, need to be fire doors and if so 30 or 60 etc.

I found this site and chose the first document (Approved Document B (fire safety) volume 1: Dwellings, 2019 edition incorporating 2020 and 2022 amendments):

Fire safety: Approved Document B

Building regulation in England covering fire safety matters within and around buildings.

www.gov.uk

If I have read it correctly it doesn't mention (on page 21) that my first floor and top floor flat (finished floor is less than 4.5m above ground level) needs any. It mentions that all habitable rooms (ie not bathroom) and excluding kitchen should open directly to a hall leading to a final exit, which it does.

I'm a bit surprised and was really hoping someone with some experience of this might confirm or let me know what I should be doing.

I might still get some even if I don't need them but would prefer to know what I have to do so I can decide how much extra I will do....

Thanks!

 

[freddiemercurystwin]

How old is the property? Is it a conversion or a new build flat? If conversion when was it converted?

 

[borndigital]

It was purpose built about 25-30 years ago