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Hello hive mind! I thought I would try tiling my kitchen floor but I have a concern… The reason we are retiling is because I tried to spruce up the old ones with tile paint (reputable brand that seemed to offer a robust system), but the paint started peeling up very quickly in areas, particularly near the external door and washing machine (see photo). I tried again, diligently degreasing and keying up everywhere and being overly cautious with drying times, and the same happened. So I removed the flaky parts and we’ve just lived with it for over a year. Now we’ve got hold of some nice new encaustic tiles that were on sale, and about to get stuck in installing them. We were thinking of just tiling straight over the old ones, as the nice new kitchen cabinets (installed 2 years ago) stand on top of the current tiles, we thought it would just be simpler to tile up to the legs (the kick board would hide this anyway), and that the current tiles would give a nice level base. However it’s started playing on my mind as to why the paint didn’t stick to the tiles…might it be a problem with damp? Perhaps moisture within the substrate? If the tile primer didn’t stick then why would the slurry bonding coat? I have a feeling you’ll say pull up the tiles… I think it’ll be concrete below, but to be honest I have no idea what horrors may be waiting under there. When we had damp treated in the walls and then a new kitchen installed, we found out this extended part of the house (over 50YO, with no paperwork), is one brick between us and the neighbour (the electrician accidentally drilled a hole into the neighbours kitchen yikes!) so who knows what else may be discovered! Any advice would be gratefully received. Thanks in advance!