Any design of Bathroom Vanity Cabinets are to consider the use of steam, hot and cold water system in the bathroom. As those three kind of liquids are the most commonly found in a bathroom one use to clean his body. Although it seems to have nothing to do with , it may directly affect Bathroom Vanity Cabinets performance in the sense of its lifetime and its hygienic.
Basic rule to notice is that one should spare at least 4 inches rise from the bathroom floor surface before putting Bathroom Vanity Cabinets. This is a must. Most Bathroom Vanity Cabinets start to get damaged starting from their base part. Yes, it is because of water splash and very high floor moisture which is absorbed by the Bathroom Vanity Cabinets porous material. When this happened bacteriae and or rust will grow up and settle in unreachable spots which is impossible to be cleaned then.
For some aesthetical reasons there are designs where one must put his Bathroom Vanity Cabinets directly on the bathroom floor without any concrete bed to lay on. Yes you can do that as long as you are sure your bathroom floor is 100% dry. 5% of moisture is the maximum tolerance you can get for this kind of purpose. Since to build a 100% dry floor surface would require a lot of cost to build. Usually the Bathroom Vanity Cabinets manufacturer or the carpenter you order them from will use the hardest and best quality of wood to anticipate the demand. Plus using the kind of Poly Urethane surface protection to make it last long.
The only thing is most bathroom will use ceramic tiles at its floor and walls. As we understand there are grout lines all over the floor surface so indeed the Bathroom Vanity Cabinets are still exposed to water in some way. Nothing is perfect and above mentioned is the best thing one can do to fulfill his dream bathroom lay out. To arrange a short meeting between you, your designer and your contractor is the best way to do prior to the work.
There is possibility to invite another contractor who do waterproofing job. Your Bathroom Vanity Cabinets lifetime will depend on his work indeed. The remaining 5% tolerance of floor moisture is a result of naturally never ending condensation process. Particularly when your bathroom environment bears a hot humid air then condensation must be handled by proper experienced contractor.