Hi, I wanted your advice as I am the landlady of a shared house which is let to tenants. A fire door has been fitted to one of the rooms and unfortunately the previous tenant has drilled into it to fit a bolt and lock to it. They have removed this on leaving and filled the small holes with filler. I am wondering whether this will affect the fire proofing of the door and am concerned whether it requires me to completely replace the door with a new one. I would be grateful for any information and advice which you could send me. Thank you Helen

To be totally sure the holes should have been filled with an intumescent material and if you contact Envirograf I am sure they will give the best advice.

What size hole is permissible not to be filled ? Ie if I remove an item from the door that was screwed in , leaving small holes , do they need to be filled ? 

If it breaks the core then the hole should be filled