New answers tagged preparation
Fill all cracks, holes, uneven spots with floor leveling compound. Otherwise those defects will wear through and cause your top layer to crack. Get the floor clean, dust-free, and dry.
We just prep the old tile by sanding it with 120 or 160 grit paper. Any loose old tiles, you have to glue them down or staple them with heavy duty staples. Or you can peel them up and use floor filler to fill in that spot.
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