The walkthrough covers every space, not only the presentable ones: plant rooms, risers, roof voids, bin stores, external walls and anywhere storage has quietly accumulated. The discipline is to record what is present on the day rather than what the drawings or the previous report say should be there. In housing this inspection is the core of a Type 1 fire risk assessment of the common parts, and photographs taken as you go become the evidence behind every later judgement.
Records fill in what a single visit cannot show. Incident and near-miss logs reveal what has already gone wrong; maintenance and test records show whether protective systems are cared for or neglected; electrical installation condition reports and earlier assessments expose recurring themes. Then talk to people. Caretakers, cleaners, managing agents and residents know about the door that never quite closes and the corridor that fills with belongings, and almost none of that reaches a filing system.