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Sealing shower

Discussion in 'Plumbing and Central Heating' started by jrussuk, 16 Sep 2019.

  1. jrussuk

    jrussuk

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    Hi

    I need some advice on re applying sealant in my shower. We have had some movement and a gap in the corner of the shower has appeared (I've attached a picture) The gap is over 7mm.
    How would be the best way of re sealing this? I was going to use CT1 sealer. piccy.jpg
     
  2. Gorners

    Gorners

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    Wow. ‘Some movement’ looks to be putting it lightly. Hard to say 100% from the photo but is the thick white bead to the left of the gap a thick bead of silicone already? If so that gap looks to be well over 7mm - far too big to properly seal with one full bead of silicone.

    Ideally you’d remove that and put a thicker bead across the entire gap but as I’ve already said that’s almost certainly too big. You can try filling the remaining gap with more silicone (CT1 fine as you’ve mentioned) but I’d be amazed if that didn’t crack again soon after.

    You could be looking at a retile here I’m afraid. Is this a new house? Wouldn’t expect that much movement on a settled property.
     
  3. HERTS P&D

    HERTS P&D

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    Looks like you are moving postcodes.

    Andy
     
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  4. Madrab

    Madrab

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    Looks like it's been a large grout line that has gone. I'd probably look to re-grout and then re-seal but if it moves again then it'll go again.

    I'd be more concerned about what else has moved at the tray level if that's what the wall looks like.
     
  5. jrussuk

    jrussuk

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    No its an old 1910 property. Had a structural surveyor look at it and he blamed it on last years hot summer. At the tray level it looks all good and sealed. The photo is taken a lot further up the wall where its at its worst. Do I "backfill"the gap with anything before resealing?
     
  6. dilalio

    dilalio

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  7. jrussuk

    jrussuk

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    Could i fit that vertical?
     
  8. dilalio

    dilalio

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    I linked to it on the basis you would be! :)
    I don't think you need to worry about a guarantee on it ;)

    It would look better than a massive silicone bead and likely more waterproof and giving.
     
  9. jrussuk

    jrussuk

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    nice one
     
  10. Madrab

    Madrab

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    Not sure but you may find it difficult to get it to be absolutely waterproof against all that mosaic.

    Normally I wouldn't disagree with the lads on here but I have to be honest, I don't like them, long term they're not very good on anything apart from a totally smooth surface in my experience.
    I'm actually going to a shower on Thursday that had them fitted a couple of years ago, the shower tray has since moved slightly, cracked the grout and seal at the tray edges and as it has all been hidden behind the seal for a quite a while, the water has leaked through the wall and wrecked the whole bottom edge of the plasterboard on 3 sides. So it's bottom row of tiles out, tray out, rebuild the plasterboard, tank and then refit everything.

    I'm not suggesting that will happen here, but the wall has already moved and rather than covering it, I'd want to fix it.
     
  11. dilalio

    dilalio

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    I agree with you @Madrab. My suggestion was aimed at the OP as a diyer and for a short term fix.
    Unfortunately, the only true remedy would be a retile, or if it was a landlord/tenant issue, I'd overclad the lot in aqua boards.
    However, a bath/shower seal (such as the one I linked to) may suffice in the vertical, if no more movement occurs, and I would be sealing it in place with silicone as an adhesive.
     
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