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 13097 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 2094 Hi Geoff Install Puddle Flange prior to any screed. Puddle flange needs to be flush with the surface so you may need to grind away the surface to achieve this. Also as… 2 8623 |