What moisture problems could arise from having a wet room, ie: steam shower area and jetted tub enclosed together behind glass?
Does this pose more of a problem for plumber, drywaller or tile layer or do all have equal responsibility in moisture barrier/ protection?
Please let me know as I have a large bath area that I would like to make into a steam shower, but also have either a jetted or normal undermount tub.
"Wet rooms" can be accommodated through the right materials and building processes being used.
1. Ventilation... reduces moisture levels during and after use. Critical!!
2. Glass enclosure... you will need a completely sealed and water tight compartment above the tub line. Cement board with a sealed membrane under the finished surface. In the scenario you posted I would suggest full size marble panels to reduce joints.
3. Balance of the room... as you will be having higher than usual steam. Walls, ceilings and floors need to be as moisture resistant as possible. From the substrates to the finished paint. Even the vanity and other accessories need to be considered as potential sources to retain moisture.
In general, lots of thought and pre planning are needed to ensure that nothing in the room has the ability to retain moisture for long periods of time.
If you haven't hired a general contractor, the moisture barrier responsibility is yours. The best thing to do in the high moisture areas is use concrete board. Tile should always be put on concrete board in those areas. Getting a higher cfm rated fan would also help a lot!
When you hire a general contractor, they take the responsibility of the trades work. When you hire each individual trade, you become the general contractor, and the responsibility of getting the job done right becomes yours. The individual trades are responsible for their work, but not responsible for the design of the bathroom. They are basically doing what you tell them to do.
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