Use the Proudman FIX Fire Door Fault Finding Decision Tree to investigate fire door problems systematically, from the symptoms you can see to the likely causes, supporting evidence and appropriate remedial considerations.

Work through structured diagnostic questions covering fire door leaves, frames, hinges, closers, latching, clearances, seals, installation defects, movement, damage and other common faults. Follow the relevant pathway to narrow down possible causes and identify what should be inspected or measured next.

Built around practical fire door installation and carpentry knowledge, the Proudman FIX diagnostic system is designed to help installers, inspectors, maintenance teams and fire door professionals make more informed, evidence-led decisions.

How to use the decision tree

1. Select the part of the fire door or the problem you are investigating.

2. Answer the questions based on the actual symptoms and site evidence.

3. Follow the diagnostic pathway to explore likely causes and relevant checks.

4. Review the findings and associated guidance before deciding on appropriate remedial action.

The decision tree is part of the wider Proudman FIX Knowledge Hub, which brings together fire door fault finding, installation guidance, technical explanations and practical resources.

Important: This tool supports fault investigation and professional decision-making. It does not replace the applicable fire door manufacturer’s instructions, the relevant fire-resistance evidence, competent inspection or an appropriate assessment of the complete doorset. Do not assume a fire door remains compliant simply because a visible fault has been corrected.