Hope we can have a simple guide on the things to check when you look at your apartment. I will start first:
1) Look for incomplete cement between tiles or at corners especially in the bathrooms.
2) Look for small pieces of tiles at corners peeling or breaking off
3) Look for hollow tiles. Use a piece of wood, start walking like a duck and knock on each piece of time on the floor and the walls to see if they are hollow. Knock on 4 corners of the tiles and also the center of the tiles. Especially watch out for the tiles near the walls or at the boundary to another room. Due to the slight height difference between 2 areas (say, the living room and the master bedroom), the tiles may not get seated so well, so, they will be hollow underneath.
That's all I have at the moment. Please add more if you have. Thanks..



