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Old 06-18-2008, 12:31 AM   #1
butterflytam
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Wink Uneven Slate Tile

Hello,

This is my first time posting on this site, but I have seen a lot of useful info. My husband and I just laid slate tiles 16 x 16. He used the finset and did the back buttering, but we still have a lot of uneven spots. I love the way it looks, but it doesn't always feel so good on my feet.

We are getting ready to grout it. Will the grout help smooth it out a little on the edges? Or can we sand some of the rougher edges a bit to make them feel less sharp? There are a few toe stumpers which I think we will have to take out and replace, but most of the uneven ones are only a hair off up or down.

I also saw a comment made that slate has high upkeep... which I thought it would actually be easier. How should I be caring for it after everything is finished?

Thank you!
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Old 06-18-2008, 12:55 AM   #2
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Hi Tammy,

welcome to the forum.


if you think the tile is high its better to replace them now.

depending on if your tile is honed or rough will determine the acceptable lippage.

slate is a soft tile so you might want to look at a good sealer like AquaMix or
Dupont StoneTech products.
they come in different sheen's.
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Old 06-18-2008, 09:29 AM   #3
steffejr
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Hello.
I am planning a slate floor (12"x12" over an 8'x8' area) when should the slates be sealed? Before laying them, befire grout or after being grouted?

Thank you for all the tips
Jason,
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Old 06-18-2008, 09:33 AM   #4
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Tammy, if your tile has a lot of "cleft" or surface texture from the various layers of stone, you can take advantage of this by using a chisel and gently removing some of the higher parts of the tile near the edge. Strike from the edge at a verry low angle and try to shear a bit of stone off. The worst you can do is break the tile and then have to start over with a new one.

Jason, seal the surface of the tiles before you set them, then again after you grout.
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Old 06-18-2008, 09:38 AM   #5
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Thanks Bob. I can't wait to get started!! 2 more weeks!
Jason
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Old 06-18-2008, 09:48 AM   #6
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Well, the first coat of sealer should be dry by then...
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Old 06-18-2008, 11:31 AM   #7
ceramictec
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I usually set the tile the seal it with either a paint roller or a bug sprayer to apply then sponge smooth.

kinda hard to seal tile prior. you would have them all over the place drying.

the prior sealer is just to make grouting easier.
so its much easier to do after installed.
then final seal everything for completion.

just my preference.
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Last edited by ceramictec; 06-18-2008 at 12:03 PM.
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Old 06-18-2008, 11:43 AM   #8
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I'm in complete agreement with Bob and Brian
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Old 06-18-2008, 12:36 PM   #9
butterflytam
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Thanks

Thanks for the info everyone. So... is sanding down any edges out of the question? Slate is soft, but not that soft?

One other question, I have put pre-grout sealer on... but it says if I want to seal after the grout is in, I need to clean off the first sealer and then reapply the final sealer since it is a different type. Is this a must, or can I go ahead and leave the pre-grout sealer there? The final sealer has teflon in it, which made me think maybe it would react strangely w/ the first sealer?

Thanks!
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Old 06-18-2008, 12:43 PM   #10
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acceptable lippage

Hi Brian,

You made a comment on acceptable lippage and that it would differentiate depending on if my slate was rough or not. It is definitely rough. Does that give an allowance for greater lippage? Approximately what measurement?

Thanks!
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Old 06-18-2008, 12:52 PM   #11
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Tammy
Grout it up and then see how it is. If there are then high spots you want to take down do it then.
I'm thinking that the pre sealer needs to come off. Personally I have never had much luck with that stuff. Left foot prints on the tile etc. When doing slate I like to use a regular sealer as a pregrout sealer.
Good Luck
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Old 06-18-2008, 05:21 PM   #12
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Sanding would likely leave either scratches, a dull surface, or if you use really find pads, shinier than the rest of the tile. The suggestion was to actually use a sharp chisel to actually chip a thin layer off the top of the tile at the edge. Since slate is made up of many thin layers, it will separate into flat chips.
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Old 06-18-2008, 05:21 PM   #13
Davestone
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Yes lippage is to be expected, i like to flip slate around and try to put the high corners together,and the lows together.
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Old 06-18-2008, 05:25 PM   #14
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Quote:
You made a comment on acceptable lippage and that it would differentiate depending on if my slate was rough or not. It is definitely rough. Does that give an allowance for greater lippage? Approximately what measurement?
that would be depending on the various different thicknesses on one tile.
you cant get every corner flat if some of the layers are taller then another side of the slate.
that's why I asked if it was honed.
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Old 07-01-2008, 03:53 PM   #15
butterflytam
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Smile Pre-grout sealer

Hi everyone,

Thank you fro all your help. I am now scrubbing up the pre-grout sealer - which totally sucks! After reading your posts, we tried the grouting without any sealer and it seemed to be the same as far as wiping it off. I'm glad I only did one room with the pre-grout sealer. I highly recommend NOT using it to anyone else getting ready to grout slate. As long as you wipe off your excess in a reasonable time, it still comes off. It took me 2 hours to scrub the room I used it in with a hard-core stripper and I'm only 1/2 done. Eek!

As far as the lippage, the grout evened most of it out. Now you can hardly tell the uneveness.

Thanks again! This site rocks!
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