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wrote:
I just finished about 30 sq feet of the bathroom tiles installed
directly over sheet lino. Before I grouted it, I walked over the
tiles and everything seems fine. Then I grouted it with sanded grout
and afterwards I could hear slight noise when I stepped on the tiles.

The noise is like that the tiles are now pushing against the grout,
like the edge of the tiles is rubbing against the grout. If the tiles
won't crack, I could care less about the noise but I don't know for
sure if I want to finish up the other 1/2 of the bathroom anymore.

When I tiled, I put the thinset at the back of the tiles instead of on
the floor itself, don't know if that would make a difference or not.

Thanks.

to reiterate what everone else said: it is a nightmare, and it began
when ou decided to install it over linoleum. Everything I have every
read/heard/been instructed on has told me the most important (initial)
aspect of tile installation is the substrate. You need an extremely
rigid surface. One that holds its structure in moist/wet conditions is
also very important (e.g. hardibacker). Perhaps that is why you heard
linoleum would be a good surface? Since it doenst disinigrate in moist
conditions? But overall it should be a terrible surface for tile
instalation, -especially- with thinset. Thinset will not adhere to
linoleum worth squat, so I would bet you those tiles are probably
already floating on the linoleum.

IMHO you -could- intall hardibacker over the linoleum, BUT it would be
best probably if you removed it.