Ken,
I made a comment, in response to Trevor Ives post about "Job in Cardiff". I dont know which type of floor he was refering to. However I was refering to Computer Room suspended floors (Not computerised offices). A few years ago I was asked to cleaned such a floor and the computer technicians showed me why they were concerned that no water at all should be used. Each carpet tile was fitted into a metal frame, which then fits into its own panel. Each frame is earthed to the overall structure. Underneath the frames was a mass of cables, plugs junctions etc. I for one was not going to take a chance with even a low moisture system, so I used a Host which did the job fine.
Dave.