Today I was called to a clients house that cost about $5,000,000, he has a marble tile floor that is a slab on grade residence and there is discolarion to the sheen of the marble in a certain area. Nothing showed up on the thermal infrared camera, but using the protimeter survey master you can plainly see the high mositure where the discoloration is taking place. What I would like to know is what is the best way to determine exactly where the leak is taking place without having to rip up all the tile. Is there a tool out there? Once again it is in the supply line, because with all the water off in the house you can see the water meter move ever so slightly, but its dead center of his house and he is not a fan of removing the tile. Thanks in advance.