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beachwalker 01-29-2011 11:45 AM

Slate flooring
We have slate flooring starting at the front entry and extending down a hall and into the kitchen. This floor is very uneven throughout and has become dangerous to walk on because of the differences in thickness of tiles, almost 1/2 inch in places, and deep holes. I can't use a sponge mop because it disinegrates, and I can't use my vacuum either. We're wondering if there is anything we can do to cover this floor with a thin layer of concrete to smooth it out and cover it? We absolutely hate it, but can't afford to have it taken out. It is installed over pre-stress concrete and using a jack hammer to remove it is out of the question. It is a loft unit. Suggestions would be greatly appreciated.

woodman58 01-29-2011 05:47 PM

You can use a self leveling floor leveler. Instead of adding water, use a liquid latex additive. Do this in stages and let it set up before putting the next coat on. Use the flat side of the trowel to level. When you think it is level then go over the whole floor with a scim coat. Then you can put any floor over this. If you put carpet down you will need to drill the tack strip to the floor.

beachwalker 01-29-2011 06:30 PM

Slate floor fix
Woodman58, thank you so much for your input. When the time comes we will contact a flooring expert and see if we can use this fix. will let you know!


fungku 01-29-2011 07:24 PM

talk to someone who does concrete toppings for a living.

if you use a self-leveller and then flooring over it, you increasing the height of your floor by at least 1/2"... check door sills, and anything else around that may be effected by this.

woodman58 01-31-2011 05:13 PM

True the tile can come up easy. But, Thinset does not come off easy if it was mixed properly.

unlvrebel 02-11-2011 12:46 PM

Another possible solution... For the tile to tile joints that have large changes in height, take a cold chisel and a hammer and slowly chip it away until the floor moves closer to "flat". Then take a palm samder with very aggressive sandpaper, say 60 grit, and sand the floor. Slate is very soft and sands relatively easy. Another alternative is to use an angle grinder and a diamond cup to hit all the high spots and then sand. Point is, there are other alternatives that allow you to keep the floor. For the areas that are severly depressed about all you can do is sand it smooth. As for mopping, use a cotton mop, not a cellulose mop.

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