I would like to put porcelain tile on my covered patio (40x12 feet). The
patio is a concrete slab. It does get wet when the wind drives the rain into
the patio. I would like to tile it because there are a few small lateral
cracks in the concrete slab of the patio.
The concrete slab had originally been covered with a 1/16" plastic coating
that looked like tile. When the plastic overlay eventually faded, it was
painted with patio paint. That was 7 years ago. The paint is in good shape
and is adhering well to the plastic coating. I would use slipsheets over any
Can I put the new thinset and tiles over the layers of plastic coating plus
paint? It looks clean and solid. I don't see how I can remove the plastic
coating. It's like rock.
Thanks for any input
More details on the plastic coating that looks like tiles will be required.
Is it glued down vinyl sheet flooring or actual tiles? Regardless, your best
job will be if you remove the old plastic. Some may say you could go over it
but I wouldn't. A heat gun and a scraper may do the trick getting it up.
Ugly dirty work but will make for a better job with less possible failure
down the road.
Now, you can educate me. What are "slipsheets"? I get the meaning and can
sort of picture them I think. Unless you have a crack that's straight, like
an expansion joint, I would think you would just need to tile over it and
hope for the best. Enlighten me.
Best practice would be to remove the plastic and expose some of the concrete
but if you want a quick and dirty job, you can probably set the tiles using
floor mastic (glue) instead of thinset. 12" or larger natural stone tiles
are not advised but a smaller ceramic or porcelin tile should hold up fine.
Not sure what the best grout solution would be since cement based grout
would probably crack with a slightly flexible substrate. Perhaps epoxy
grout or acrylic or silicone caulk would work out. Regular grout may
actually work if it is not as flexible as I am imagining.
Not an answer to your original question, but I would be concerned
about slip and fall risks when rain hits the patio. Does the tile
you're thinking of have a glossy surface?
In my last house, the previous owner got a "good deal" at an estate
sale on 1'x2' marble tiles. He decided it would be a good idea
to cover the patio slab with them. Looked real nice, but when
it rained, you went skating.
Sister-in-law redid her patio last year with flagstone in a mortar
bed. Looks real nice, no slip and slide when wet.
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