Create a normal baseline
Photos make later cracks, stains and swelling easier to compare.
Record recurrence
A repaired crack that repeatedly returns may deserve further review.
Do not hide unexplained moisture
Painting over a stain is not the same as resolving its source.
Match the response to the cause
Cosmetic touch-up makes sense only when a more serious cause has been reasonably ruled out.
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.