Keep insulation and ventilation records
Product type, upgrades and contractor reports are useful.
Use safe observations
Ceiling staining, ice-dam history or professional photos can be tracked.
Avoid walking where there is no safe platform
Ceiling material between framing does not support a person.
Use qualified inspection when conditions are uncertain
Electrical, moisture, structural or hazardous-material concerns need appropriate expertise.
Safety boundary. This site is for planning, observation and records. Do not improvise electrical, fuel-burning, structural, roof-height or other hazardous work. Follow manufacturer instructions, applicable codes and qualified professional guidance.