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Grout discolouration in bottom tiles of shower

  • 06-11-2021 11:56am
    Registered Users Posts: 90 ✭✭ newfy


    I renovated the bathroom in my timber frame house with white subway tiles and silver grey grout.

    When I strip the bathroom down I refit the stud walls with moisture resistance plaster board, then I tanked the walls and where the shower tray meets the wall I used magic seal to stop any leaks.

    The tiler then used silver grey silicone where the shower tray meets the tiles on the wall so I think I done everything right!

    BUT what I have noticed over the six months is that grout on the bottom row of subway tiles have turned very dark...the rest of grout on the walls are fine it’s just the bottom row!

    has anyone experienced this? Is my grout soaking in dampness? It always stays this colour even when the bathroom has dried ? Is it because the bottom tiles receive the most water from the shower so the grout has discoloured??

    I am worried as my house is of Timber frame structure and I don’t want dampness getting behind the walls and into the timber frame and causing rot!!

    any advice please ?


    Post edited by newfy on


  • Registered Users Posts: 90 ✭✭ newfy

    Anyone for this ⬆️

  • Registered Users Posts: 88 ✭✭ bigmac3


  • Registered Users Posts: 2,150 ✭✭✭ Yellow_Fern

    HG mould remover might solve it.

  • Registered Users Posts: 90 ✭✭ newfy

    I’ve tried cilit bang black mold remover! Made no difference!

    Strange that it’s just along the bottom row of tiles in shower!

  • Registered Users Posts: 20 MickyD

    at least your tiler used silver grey silicone where the shower tray meets the tiles on the wall, mine used grout which became displaced due to momement and the flow of water! so I had to painfully remove and replace ther gap with silicon

    the grout should dry after a few days if the shower is not in constant use and if it is not spreading up further to the next row of tiles then you should be fine

    u could always silicion over this row of tiles if u wish to be extra safe but it may compromise the finish

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