How do I know when to stop an ordinary DIY investigation? Leave the immediate area or stop ordinary investigation when alarms, smoke, sewage, structural instability, energized water or acute symptoms are present.
What to compare
Record the first location, timing, trigger, recent change and an unaffected comparison area. Keep weather, occupancy and system state with every photograph or reading.
What the evidence cannot prove alone
A single reading, image, smell or temporary improvement cannot certify a concealed source. Keep at least two plausible pathways visible until repeatable evidence separates them.
Safe next step
Use the site as an information and evidence tool. Stop ordinary self-help at electrical, combustion, contamination, structural, access or acute-health boundaries. Continue with Protect people and stop for a bounded action, stop rule and professional handoff route.
