At RHMM we can do a physical test that points at the location of hidden moisture and mold via non-destructive testing..
The following are two examples.

The Shower Wall

In this example it is suspected that because of a crack in the grouting of the tiles in the shower area moisture may have accumulated behind the tiles above the base. See photo:

We scanned the area with the moisture scanner. The area-graph below shows the Relative Humidity summed along the edge of the bottom of the shower base and in horizontal lines above it as a function of the height above the edge of the shower base.

It is clear from this graph that moisture has already accumulated behind the tiles. If the problem is not solved this can cause a significant mold problem.

The Shower Ceiling

In scanning the ceiling of the shower area we discovered a fairly large spot of drywall (approximately 100 square inches) that had a substantial larger relative humidity than the surrounding drywall ceiling as is shown in the following three dimensional graph:

There was no visible indication of a water stain, a wet spot or bulging of drywall as the following photo of the same area shows.

After further investigation we discovered that there was a leak from the bath-tub in the bathroom above it.
Once the ceiling was opened a mold investigation via the tape lift method identified excessive mold growth (hyphae) on the inside cavity between ceiling and flooring.

This example shows how we can find mold growth that was still shielded from the naked eye via a non-destructive method by using the moisture scanner. By solving the problem at this time we can prevent future adverse health effects for the occupants that may be the consequence of excessive mold growth.