Hello all.... quick question. I have a customer who's built a new home. I've tiled the walls and have the floors still to do. They're 50mm anhydrite incorporating piped underfloor heating. The floor was poured in December and heating has been on for a few weeks now. However, I put down my hygrohood and the reading will go down to 79% then the next week its at 96%. I even bought another one and put them side by side but they both read within 2% of each other. When lifting the hood there is no dark stain underneath to suggest the floor still retains water....so do I tile or not???? I have a decoupling mat ready to go down but I know that once I seal the floor and put it down with porcelain tiles on top I'll be sealing in any moisture and causing possible problems....whats the best option....thanks.