Confirm the location
Record the room, building layer and what sits above, behind or beside it.
✣Attic
Visual Match pattern
Snow localized near an attic vent
A local deposit after wind-driven snow suggests exterior entry.
Visual resemblance is only the first clue.Location, timing, texture and what makes it change are more useful than color alone.
Decode this pattern →Watch the trigger
Rain, water use, temperature and equipment cycles separate causes.
Verify before repair
Use the next distinguishing check instead of treating the surface appearance.
