Wooden floors can be laid with no problems in both the kitchen and the bathroom. Water does not damage parquet floors as long as it does not stagnate. It is extremely useful to choose species of wood that are more stable in contact with humidity, such as Doussiè, Merbau, Iroko and Teak. Oak, on the other hand, requires certain precautions because it has a tendency to form blackish spots when it is exposed to humidity; the spots are caused by leaks of tannin, which is quite common in this type of wood.
Especially with the bathroom, it is important to consider carefully the type of parquet floor to be installed (size, type of wood and protection), taking into account your expectations and future use. If you expect that your bathroom will be used all the time, as it is the main bathroom in the house where family members wash themselves frequently and children also use it, it is important to guarantee the surface of the parquet floor with intense protection. In any case, for peace of mind and only as far as the shower, bathtub, toilet and bidet areas, it is recommended to choose more practical floor, made of stone or ceramic material.
In any case it is advisable, in order to have a good care of the floors, to always open the windows and aerate the rooms after the use of showers or alike, in order to remove possible humidity deposits in the rooms, and in this way avoiding the floors being altered.