Browse Forums Bathrooms and Laundry 1 Oct 20, 2023 1:53 pm Hi everyone, Have just put a shower in the laundry and after only using it 2-3 times have noticed staining on the grout. The tiles were glued onto a concrete wall after waterproofing. The grout used was Novatex, which I think is a decent brand. Any suggestions on what it could be? I am not sure if is mould or something else. The laundry is on the bottom floor of a 3 story split level, which is all brick and concrete and is always cold compared to the rest of the house. Thanks, Dan Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Thanks splashers, that makes sense. The waterproofing guy used this Davco product, I will raise the issue with builder and hopefully get resolved with him - if not… 2 13007 Have some black tiles in our bathroom on one feature wall laid on top of the waterproofing. What I think is efflorescence or white chalky looking grout has turned the… 0 1870 Render your bathroom walls, two opinions versus the one, makes you wonder. 3 6217 |