Hi all, After some advice. I’m tiling a 4m floor in 1 inch hexagon mosaics. The floor is green chipboard which is pretty secure but I would always use ditramat 25 on it prior to fixing but Schlüter have said not to fix anything under 50mm on to ditra 25. Anyone had the same issue? It’s not the sort of job I fancy doing twice! Cheers for any help.