I am tiling a hearth with 4X4 slate tiles. I installed the tiles over
a month ago and sealed them twice.

Today I grouted the hearth and it was a total mess. I used a float to
work the grout all over the hearth and this seemed fine. Then I got up
a reasonable amount of grout with the float. The grout directions said
to wait 45 minutes at that point so I waited... then I started
removing the grout on the tiles using spones and rags and it was a
complete mess. None of the grout was dry (maybe this is correct---this
is my first attempt at tiling) and I had to work like crazy to get the
grout off the tiles.

At this point all of the tiles are clean, which is nice, but there is
hardly any grout left in the tile joints. This is because of the
scrubbing and rubbing that I had to do to get the grout off off the
tile faces.

I am sure that I did something wrong because the grout lines are pretty
ugly, not smooth, etc.

I am suspicious that I removed the grout too early and that I should
have waited until the grout in the joints was hard. Is this right?
Any other ideas here? The sealer evidently worked because when I look
at the tiles now I see grout only in the joints.

Assumign that I can figure out what I did wrong, I want to re-grout the
entire hearth so that the grout lines look good. Can I just put
another layer of grout on top of the existing grout? THe hearth will
not be a heavy traffic area. I am going to place a woodstove on it
when I am done.

Thanks, mh

???

When you're done putting the grout down there should be no more than a
thin hazy layer on the tiles. Then you can sort of wet that and work
it with a sponge and it comes off.

You don't seal til the job's all done.

(The above info may be wrong but it's my experience)

wrote in message
.com...
???

When you're done putting the grout down there should be no more than a
thin hazy layer on the tiles. Then you can sort of wet that and work
it with a sponge and it comes off.

You don't seal til the job's all done.

(The above info may be wrong but it's my experience)

I was told to wait three days before sealing, that could be wrong too,
but it is what I was told.

Cheri

Cheri wrote:
wrote in message
.com...
???

When you're done putting the grout down there should be no more than a
thin hazy layer on the tiles. Then you can sort of wet that and work
it with a sponge and it comes off.

You don't seal til the job's all done.

With slate (unlike ceramic) I was told that I needed to seal before and
after grouting because the slate would otherwise absorb grout.

mh

"Mike" wrote in message
oups.com...

Cheri wrote:
wrote in message
.com...
???

When you're done putting the grout down there should be no more than a
thin hazy layer on the tiles. Then you can sort of wet that and work
it with a sponge and it comes off.

You don't seal til the job's all done.

With slate (unlike ceramic) I was told that I needed to seal before and
after grouting because the slate would otherwise absorb grout.

mh


that may be true with slate. I know it's one recommended practice with
saltillo tiles. Where you went wrong was letting the grout "dry" before
cleaning (even if was only 45 mins). My method looks something like this
and I've done more than a few hundred feet of the stuff. I grout using the
float and do my best to minimize the amount of grout actually on the tiles.
For smaller tiles, this can be difficult but on larger ones, you can darn
near keep the tile clear of any grout. I do around 9-12 SF at a time only
cause that's as far as I can reach generally. Once I have them all grouted,
I take a sponge with two buckets. Both start out with clean water. I wet
and wring the sponge out and start cleaning the tiles. I work at the grout
line at a 45 degee angle. When the sponge gets dirty, rinse in bucket
number 2 and then refresh the sponge in bucket number one. Keep at it until
you've got as much of it up as possible. You can really smooth out the
grout lines as well although you don't want to add too much water to them.
Let it dry. Then go back and wash it again as there will undoubtedly be
some haze. For really bad hazing, you may have to use a bit of vinegar to
help with the cleaning (although there are other acids out there to do the
same).
Cheers,
cc

James "Cubby" Culbertson wrote:
"Mike" wrote in message
oups.com...

Cheri wrote:
wrote in message
.com...
???

When you're done putting the grout down there should be no more than a
thin hazy layer on the tiles. Then you can sort of wet that and work
it with a sponge and it comes off.

You don't seal til the job's all done.

With slate (unlike ceramic) I was told that I needed to seal before and
after grouting because the slate would otherwise absorb grout.

mh


that may be true with slate. I know it's one recommended practice with
saltillo tiles. Where you went wrong was letting the grout "dry" before
cleaning (even if was only 45 mins). My method looks something like this
and I've done more than a few hundred feet of the stuff. I grout using the
float and do my best to minimize the amount of grout actually on the tiles.
For smaller tiles, this can be difficult but on larger ones, you can darn
near keep the tile clear of any grout. I do around 9-12 SF at a time only
cause that's as far as I can reach generally. Once I have them all grouted,
I take a sponge with two buckets. Both start out with clean water. I wet
and wring the sponge out and start cleaning the tiles. I work at the grout
line at a 45 degee angle. When the sponge gets dirty, rinse in bucket
number 2 and then refresh the sponge in bucket number one. Keep at it until
you've got as much of it up as possible. You can really smooth out the
grout lines as well although you don't want to add too much water to them.
Let it dry. Then go back and wash it again as there will undoubtedly be
some haze. For really bad hazing, you may have to use a bit of vinegar to
help with the cleaning (although there are other acids out there to do the
same).

Ok, this makes sense. Thanks! I like the two bucket idea as in fact I
quickly ran into a dirty bucket and did not have another in the house.
My tiles are 4X4 and I can certainly do a better job of not getting
grout all over them.

mike

Mike wrote:
I am tiling a hearth with 4X4 slate tiles. I installed the tiles over
a month ago and sealed them twice.

Today I grouted the hearth and it was a total mess. I used a float to
work the grout all over the hearth and this seemed fine. Then I got up
a reasonable amount of grout with the float. The grout directions said
to wait 45 minutes at that point so I waited... then I started
removing the grout on the tiles using spones and rags and it was a
complete mess. None of the grout was dry (maybe this is correct---this
is my first attempt at tiling) and I had to work like crazy to get the
grout off the tiles.

At this point all of the tiles are clean, which is nice, but there is
hardly any grout left in the tile joints. This is because of the
scrubbing and rubbing that I had to do to get the grout off off the
tile faces.

I am sure that I did something wrong because the grout lines are pretty
ugly, not smooth, etc.

I am suspicious that I removed the grout too early and that I should
have waited until the grout in the joints was hard. Is this right?
Any other ideas here? The sealer evidently worked because when I look
at the tiles now I see grout only in the joints.

Assumign that I can figure out what I did wrong, I want to re-grout the
entire hearth so that the grout lines look good. Can I just put
another layer of grout on top of the existing grout? THe hearth will
not be a heavy traffic area. I am going to place a woodstove on it
when I am done.

Thanks, mh


Sounds like you tried to be too neat and your
grout was too wet. You just slop in on all over
making sure it fills all joints, then wipe off the
tiles with a rubber squeegee, I wouldn't call it a
float but probably a lot of people do. The
squeegee should just wipe the tile tops and leave
the grout in the grooves. When you get it all the
extra grout wiped off, you go over it once more
with a clean squeegee. Wipe with a sponge after
you test the grout and the sponge does not lift
the grout. Wiping with a sponge should remove
just enough grout to be a hair lower than the
tile. It will naturally be a very shallow U.