How to install a shower wall Vapor Barrier?

Vapour barriers are an important part of building construction.It's purpose is to help prevent water from reaching building walls, ceilings, attics, crawlspaces or roofs, where it can cause building materials to rot or grow mold.

I called USG, the maker of Durock cement board Next Gen, and they told me to use no vapor barrier to allow the wall to breath.There is no use of a vapor barrier in their online instructions.

Bill Rose calls it the rule of material wetting, which means that you can have problems here even without the exterior vapor barrier.Warm materials dry more quickly than cold ones.The problem occurs when the vapor barrier prevents the space from drying out.

A vapor barrier is a material that won't allow water to pass through it.It is designed to stop the water from entering the wall.There are two basic types of barriers.Paper-faced insulation is the most common.

Porcelain is a little more expensive than ceramic, but it is denser, more water resistant, and more durable.The life-expectancy of porcelain and ceramic wall tiles is several decades.They are more likely to go out of style.