I want to change the ceramic tiles at the foyer of my old house (1975). Under the tiles, it is concrete subfloor with thickness of one and half inch. The contractor told me that I have to replace the concrete subfloor because the concrete is too soft, not real concrete. The concrete subfloor looks soft. I can easily break it with a hammer. My question is what is the name of this kind of concrete subfloor? Do I have to replace it?Thanks.
It is a softer form of cement but very well suited for ceramic tile. Standard depth ( in most cases) is 3/4 It will bust up easier than concrete but in most cases , if it was done right, you ll have your work cut out for you. These are called mud jobs in the tile world. Some do come out easy but most that I ve had to take out are a PIA and dusty mess. Use a small 3 or 5# sledge and a crow bar . Wear leather gloves because there will be a wire mesh lathe in it. A pair or time snips help to cut up the wire as you go. Any questions you can e mail me through my avatar and check my qualifications there. GL
