I have white tiles in my shower but the bottom row of tiles have started changing color they are turning blue,
The home is 2 years old and that shower gets a bit of use.

The Shower has 3 wall of tiles and 1 side is the shower screen.

The bottom row of tiles on all 3 walls are changing color, once it hit the grout line it has stoped rising - but now the grout in the corner is turing a darker blue as well.

Even when you touch the tiles they feel different to the other ones now.. it's hard to explain (Tried taking photo of it but you can't really tell in the pics)

The plaster on the other side of the wall seems ok.

Has anyone seen or heard of this happening before.
I need some help cause the bulider I am dealing with is giving me the sh**s:((.


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