We have to router the head of the door to fit intumescent strip but this ruins the certificate sticker on the door. 

So we take pics of it before as evidence. 

There is no way of moving sticker as when you try to take it off it just breaks up. 

And can we cut head of door to fit out of level frame head to. 

HI Ben,

Answers based on my knowledge and experience, below:

Q: We have to router the head of the door to fit intumescent strip but this ruins the certificate sticker on the door. 

So we take pics of it before as evidence?     A:  YES in accordance with the certification data sheet for the fire door leaf and keep a record of the work done and the door's certification.

Q: And can we cut head of door to fit out of level frame head too?    A:   Only if the certification data sheet for the fire door leaf permits.

PS. You can find the certification data sheet from the certification number on the 'certificate sticker'. 

Hope this helps.

Damaging labels is why it's preferred to put the seals in the frame and not the door, solves your problem - fire door frames often have the channels pre-cut.

Going into old fire door frames.

13 hours ago, AnthonyB said:

Damaging labels is why it's preferred to put the seals in the frame and not the door, solves your problem - fire door frames often have the channels pre-cut.

Good advice!  Although it seems Ben is installing the door leaf to an existing frame, hence the head problem.

Best practice is always to install a complete new fire door assembly or fire door-set because using an existing door frame means you will carry forward any door frame defects such as:

> Has the gap between the frame and the wall been sealed correctly?

> Do the hinge positions and lock positions suit the installation requirements for the new fire door leaf?

> Does the frame sectional size and material suit the installation requirements new fire door leaf?

> Can the door leaf and door frame be aligned correctly?

> Is the frame adequately fixed to the wall?

Consult BS 8214:2016 Timber-based fire doors Code of practice for information.