You may suspect hidden mold if a building smells
moldy, but you cannot see the source, or if you know there has been water damage and residents are
reporting health problems. Mold may be hidden in places such as the back side of dry wall, wallpaper,
or paneling, the top side of ceiling tiles, the underside of carpets and pads, etc. Other possible
locations of hidden mold include areas inside walls around pipes (with leaking or condensing pipes),
the surface of walls behind furniture (where condensation forms), inside ductwork, and in roof
materials above ceiling tiles (due to roof leaks or insufficient insulation).
Have a air sample done.