Water penetration through grout between shower wall tiles, possible mold
I recently tiled a shower over bath and have an issue with moisture creeping through the grout and creating a dark section (water absorption) on the durock wall board behind the see through glass wall tiles.
I have since sealed the grout several times and am now concerned that the moisture will cause mold between the tiles and the tar paper I lined the wood studs with. I'm hoping the moisture will eventually evaporate now that the grout is sealed. But should I be concerned about mold? If so what can I do about it?
Thanks
Adam