We have a floated concrete floor over the wooden subfloor...Our Client is highly allergic to mold, and wanted to use Red Guard as a crack resistant, and moisture protector under porcelain tiles...We put the Red Guard down, but now the client wants to use travertine, and is worried that the Red Guard will hold moisture underneath the travertine, since travertine is porous unlike porcelain...Can we use Red Guard with travertine, or should we have her stick with the porcelain? Is there any potential of mold growing between the Red Guard and the travertine?
Thanks!!!!