Can you upgrade a standard door lining to an FD30 spec?

[cbk]

I've installed standard door linings to first floor bedrooms and plans are approved without need of fire doors.  But new BCO is insisting that because I've put a staircase in to reach the loft space, then this now means all first floor doors opening to stairwell need to be rated FD30.  Loft space is a mix of plant room and a gym/kids play room so not classified as habitable space.    But BCO is arguing that it could be turned into bedroom space in future and hence I need to comply with regs for haitable space just in case.  I'm at first fix stage so linings are in and plasterboard is nearly complete.  I can add FD30 doors no problem but is there any way to upgrade the frame?  Or must these be replaced?   Or can I just argue that approved plans are for non habitable space and any change of use would need to address FD30 requirements in the future?

 

Any ideas welcome.

[nod]

He is correct 

Most will accept a clear painted covering to the doors Our friends have just had exactly this problem 

[JohnMo]

We had an old house and when we converted, our doors needed to be FD30, building control said and approved a incemesant paint and smoke seals around the door/door frame and self closure mechanism.   The paint had to be applied by certified person, they would not accept me doing it.