This Wood Information Sheet gives guidance on assessing the suitability of existing doors for upgrading to give a 20 or 30 minutes’ fire resistance comparable with that of purpose-made fire doors. Upgrading to 60 minutes’ performance will rarely be possible.
Upgrading the fire resistance of existing doors is a common requirement in heritage buildings. Conservators look for solutions with minimal impact on the appearance and function of existing doors.
Reasons for upgrading timber joinery doors for fire resistance.
Does the person that is going to be carrying out the upgrading work have demonstrable competence in upgrading the fire-resistance performance of timber joinery doors?.
What level of fire resistance is required?.