In article ,
Andrew Gabriel wrote:
I think tile adhesive also contains, as name suggests, adhesive.
I suspect tiles might pull off mortar without a lot of effort.

I think they used to use mortar in the old days - I had a splash back in
my kitchen so done. And they took some removing as the walls were also
skimmed in mortar, with a thin skin of plaster on top.

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*Why isn't there a special name for the back of your knee?

Dave Plowman London SW 12
RIP Acorn