Home > categories > Construction & Real Estate > Cement Boards > When building a tile shower. On walls, can I use poly behind cement board and redguard on top?? Too Much??
Question:

When building a tile shower. On walls, can I use poly behind cement board and redguard on top?? Too Much??

My fear is that I will trap moisture where it shouldn't be. Is there such a thing as overkill?

Answer:

Tile council of America calls for a vapor barrier behind the cement board ..The red guard your talking about should and must be used on any horizontal surface in a wet area.. There are other agents like red guard but I v used it many times and had great luck w/ it..Making sure the proper pitch is used for the horizontal surface GL
May 11, 2017

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