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Discuss Dark grey grout gone white patchy ? Efflorescence ? in the Tile Adhesive, Grout and Substrate Preparation at TilersForums; Please help, do you reckon its efflorescence in my grout lines ? Will I have to dig out and re-grout ? or is there a quick way to resolve ?...
          
  1. 22-09-2010 #1
    GaryVenters
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    Default Dark grey grout gone white patchy ? Efflorescence ?

    Please help, do you reckon its efflorescence in my grout lines ? Will I have to dig out and re-grout ? or is there a quick way to resolve ?
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  2. 22-09-2010 #2
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    Default Re: Dark grey grout gone white patchy ? Efflorescence ?

    how olds your grout is it internal or external and whats the substrate under tiles pics would help
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  3. 22-09-2010 #3
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    Default Re: Dark grey grout gone white patchy ? Efflorescence ?

    Bathroom floor was grouted Sunday, substrate is 22mm plywood, used bal grey flex addy. Grout is Ardex FS grout 4mm grout lines
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  4. 22-09-2010 #4
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    Default Re: Dark grey grout gone white patchy ? Efflorescence ?

    Quick fix is Aquamix grout colourant.
    Tradetiler Aqua MIx Grout Colorant
    Wall and floor tiler in the West Midlands, Dudley, Stourbridge. www.nptiling.co.uk
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  5. 22-09-2010 #5
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    Default Re: Dark grey grout gone white patchy ? Efflorescence ?

    There are more cases of Efflorescence reported on this forum down to BAL grouts than any other manufacturer. A BAL rep told me once it was due to the type of sand they use in their mix, or something along those lines.
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  6. 22-09-2010 #6
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    Default Re: Dark grey grout gone white patchy ? Efflorescence ?

    Ardex grout.. It is more than likely Polymer/latex leaching from the washing off process... scrub the joints with a scotch pad and a solution of LTP grimex... This should sort it..

    I doubt it is Efflorescence , as this is a white powder formation and not just a whitish effect..

    Try the cleaning part and report back once dry..

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« Starting to get confused about surface prep | Grout sealing by LTP sealer's »

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