I'm concerned about the tiles I found under the carpet in the room which is going to be our new kitchen. They've probably been there since the house was built around 1955, and are practically impossible to get up. (We've had a little success using a wallpaper scraper and a steamer, but its extremely tedious, and could never be finished in time for the kitchen units being fitted). We are having floor tiles fitted, ceramic or porcelain, and I'm worried that they won't bond well enough to the old tiles beneath. The builder says he will roughen them up thoroughly, and use Polybond, which I believe is a PVA-type adhesive, in the tile cement. Does this method sound ok? Has anyone any experience or suggestions to share?
Also, any opinions regarding printed ceramic tiles (cheaper), versus porcelain tiles (nearly double the price, but harder wearing I hear). Thanks!