A
astute1
Hi everyone, have uploaded some pics for your to check out. Is this lime scale. I tiled this bathroom and shower stall for a client about 3 yrs ago and went back to tile a second bathroom for them, they wanted the same tile set up for the 2nd job so I went to the look at the first bathroom as a reference and saw this in the bottem of the shower. The client has cleaned the shower constantly and cant get rid of this. She said it appeared only a few months after the job was complete. It will scrape off, almost like a calcium build up. I used the ardex superflex wpm and the ardex abaflex ady, ardex grouts and silacones so I cant expect there would be a compatabiltiy issue. The client is on tank water ( rain water collected from the roof) I have never had this happen before , been tiling full time for 12yrs. Can you Identify this and is there a way to stop it returning