Step by step
7Check for danger first
If water reached electrical equipment, stay out and call emergency services. Sewage or floodwater goes to a remediation professional.
Write down · DecisionList every possible source
Consider rain, surface water, groundwater, plumbing, humidity, sewer backup, and construction water. Keep each one open until something excludes it.
Write down · NoteMap where it shows
Photograph the wet area, stain edges, and tide marks. Note the weather and whether it tracks rain or plumbing use.
Write down · PhotoTake readings and know their limit
Record moisture readings and where they were taken. A meter shows wetness. It does not show where water came from.
Write down · ReadingTrace how water could travel
Think gravity, wicking, wind, splash, and ground pressure. Follow the rain, air, and insulation layers at the spot.
Write down · NoteTest one change at a time
Try one interim change, such as extending a downspout, and watch through rain. Several changes at once hide what helped.
Write down · TaskDo not close it wet
Keep it open until readings at the slowest-drying spots are recorded and one side of the assembly can still dry.
Write down · Decision
A finished run leaves the source list, photos, located readings, any test change, and what is still unknown.
General guidance for a qualified person, not a finding about any home. The person on site decides.