I have a rather difficult problem to replace a broken wall tile in a bathroom with curved walls. I have removed the broken tile and most of the old mortar with an angle grinder, and the space is ready to apply the new tile. However, due to the wall curvature, the mortar needs to be over 1 inch thick at the center.

What would be the best sort of mortar to use in this situation?

Thanks.

No expert but in my experiances don't put a thick amount of tile adhesive in the middle part, as when it dries out it could and in most cases cause the tile to crack.

Use any type of suitable filler first until you have a level even surface then apply the tile adhesive & tile.

No expert but in my experiances don't put a thick amount of tile adhesive in the middle part, as when it dries out it could and in most cases cause the tile to crack.

Use any type of suitable filler first until you have a level even surface then apply the tile adhesive & tile.

Thanks for that, but what would be a suitable filler for a bathroom wall?

Also, if I can't use the tile to hold the filler in place, wouldn't it sag? The original tile was held on by some sort of mortar, but I don't know what it was.

No expert but in my experiences don't put a thick amount of tile adhesive in the middle part, as when it dries out it could and in most cases cause the tile to crack.

Use any type of suitable filler first until you have a level even surface then apply the tile adhesive & tile.

Thanks for that, but what would be a suitable filler for a bathroom wall?

Also, if I can't use the tile to hold the filler in place, wouldn't it sag? The original tile was held on by some sort of mortar, but I don't know what it was.

You can get small packets of wall filler and suitable tile adhesives in many types of stores.

Maybe what I should of said is infill with the filler first and let it dry out completely, say 3-4 days and then spread the normal layer of tile adhesive for the replacement tile, re-grout the next day.

No expert but in my experiences don't put a thick amount of tile adhesive in the middle part, as when it dries out it could and in most cases cause the tile to crack.

Use any type of suitable filler first until you have a level even surface then apply the tile adhesive & tile.

Thanks for that, but what would be a suitable filler for a bathroom wall?

Also, if I can't use the tile to hold the filler in place, wouldn't it sag? The original tile was held on by some sort of mortar, but I don't know what it was.

You can get small packets of wall filler and suitable tile adhesives in many types of stores.

Maybe what I should of said is infill with the filler first and let it dry out completely, say 3-4 days and then spread the normal layer of tile adhesive for the replacement tile, re-grout the next day.

OK, I'll see what I can do.

Thanks.