- Source: the shower valve, inside the bath wall, where the readings peak.
- Rings join points that read the same. Where they bunch up, the damp is concentrated.
- Dry wall: bedroom 1 reads 11, and every number is read against it.
- Old kitchen stain: reads 12, the same as the dry wall. Leave it.
What we found
High readings in the wall between the hall bath and the bedroom 2 closet, peaking at the shower valve. Growth low on the closet’s back wall.
Where it comes from
The shower valve leaks inside the wall whenever the shower runs.
Is there work to do
Yes, in the closet and the lower bath wall. The kitchen ceiling stain is old and dry, so leave it.
Work to do: closet, bath wallLeave it: kitchen ceilingWhat we’d do first
Have the valve repaired. Then we seal off the closet and take out the wet drywall and insulation. Clearance samples come before the wall is closed.






