I recently had my home refurbished which included the majority of downstairs with UFH and a tiled surface.
There was the membrane for the UFH (a red plastic tray) placed everywhere downstairs and then the pipe laid in situ, then the screed and 3 weeks later the Ditramat or similar (was yellow) went down then the tile on top of that (600x600 porcelin)
the floor looks lovely and the UFH is excellent, its just over the last month i have noticed that certain tiles seem to creak....sounds like grit rubbing together in your hands and this has spread to other areas.....
is this me just being paranoid and this is natural movment as and when the heating goes through its daily cycle or not ? it's worth mentioning that the hallway which is also part of the downstairs area that is tiled does not have UFH and none of these tiles move.
any input appreciated from you pros before i speak to my tiler.