Upgrading timber joinery doors for fire resistance

Date Published

9 August 2022

Document Type





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.

Key Information

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?.

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Case studies

In 2015, the architectural practice Squire and Partners purchased a dilapidated three storey department store in the centre of Brixton.

In 2003 Meredith Bowles completed a timber frame home for his family and an office for his architect’s practice in the Fens village of Prickwillow near Ely in Cambridgeshire.