"1969Benz" wrote in message
ups.com...
Hi all,

Just bought a house that was "refurbished" by the previous owner. I
think she did all the work herself, or with the help of a builder
friend. Unfortunately, now it's my responsibility to fix bits of it
up that weren't done properly. After a couple of weeks I started to
notice that the shower wall tiles, after a long-ish shower, were
showing grey watermarks that started from the grout line and headed
toward the centre of the tile. Tiles are white by the way. The
watermarks varied in size from about thumbprint size to around
double
that.

I've Googled for hours and been reading this newsgroup for the last
2
or 3 hours as well and am still not 100% sure how to proceed. And,
I
should own up at this point, I've already removed ALL the grout (not
the caulk) in the shower and done it over once, including using a
paint-on sealer on the new grout a couple of days after the grout
was
installed (?) - which didn't improve the problem!

It IS possible that I screwed up the mixing process for the
(unsanded)
grout and made it too hard - it ended up sort of like putty and I
was
told it should have been more like toothpaste.

My question is this: Should I attempt to do the job again, assuming
I
can do a better job mixing the grout, or is there a bigger problem?

I'm not a home-handyman by any stretch of the imagination, but as
this
is my first house I wanted to have a go at fixing a problem myself.
I
haven't seen any other post about re-tiling or re-grouting that
mentions watermarks (darkened areas) on the tiles themselves, only
the
grout lines. I think the tiles are reasonably new, within the last
6
months or so. The watermarks disappear after a few hours, but I
still
worry that it can't be good for them to be appearing in the first
place.


Tile should not absorb water. These must be some wierd tile.

Did you seal the grout after you re-did it. If not, that might help,
but probably won't.

Grout is not waterproof. If the tile is permeable, the grout can't
stop it. Epoxy grout might, but that's not sure, and it is more
involved than regular grout.

Bob