Before work begins to install the ceramic tile floor, evaluate the work area. What is sought is asbestos. If the work area was built during the 1970s or before, the chances of occurrence of asbestos is very high. Asbestos was used extensively in the construction industry until the end of 1970. Asbestos is the main cause of a form of lung cancer known as mesothelioma. When disturbed, its fibers into the air you breathe. The precautions to be taken to ensure no fibers breathe.
Then, the basis on which the ceramic is going to be on the needs assessed. There are certain fundamentals that are not suitable for the installation of ceramic tile. They are cushioned vinyl flooring, all types of particle board, plywood, OSB (Oriented Strand Board), tongue and groove boards and wooden floors. Concrete is a good basis for installing ceramic tile.
If the bathroom is in a home foundation, plywood can be underground and will not have a choice to install the tile floor in it. If that is the case, then the option is to put a membrane between the ceramic and plywood to reduce the likelihood of moisture entering the plywood.