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    • Any
    • By Any 14th Oct 16, 10:22 AM
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    • 8,012Thanks
    Repetetively failing silicon around shower base
    • #1
    • 14th Oct 16, 10:22 AM
    Repetetively failing silicon around shower base 14th Oct 16 at 10:22 AM

    I am not sure anyone actually has any solution or ideas how to deal with the problem we are having.. But here is a try.

    Basically, we had rather large bathroom failure, where the silicon around our shower corner base (our only shower, no other shower or bath) failed and it had leaked probably for some time.
    We took the ceiling down and discovered damage to joists too. This explains why the gap in between the top of the tiles and the base was getting bigger, now it stands at about maybe 4-5mm.

    We are having builders in in 6 months to rip it all out, and redesign the whole space (new joists, floors, walls - the works), but we need to last until then!!

    It seems that despite putting loads of silicon in, the seal is still not water tight and there is an escape of water. We have redone this number of times. I think the gap is now too big and so the silicone keeps failing. I can feel from below that the floor is still slightly damp (as we still have no ceiling).

    Is there any product, doesn't matter what it looks like, that I can paint over the silicon and tiles to create more of a waterproofing, or something I can place over the gap with silicon? Some sort of tape, glue, anything.

    The only other option I see is for someone to come in, take the shower out, bottom layer of tiles and redo the whole thing. Obviously this will be expensive if I could even find someone to do job like that (we always struggle get people in for smaller jobs. Unless it is to replace the whole bathroom). Given that it will be ripped out in 6 months time, I just want to see first whether there is anything we can try to just tie us over for the 6 months to save the expense (and the fact we will be shower less for period of time!!).
Page 2
    • Any
    • By Any 15th Oct 16, 8:32 AM
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    Silicone won't stick to silicone . If the gap is too deep use foam strips to fill them silicone

    If you have a gap at the bottom of the tile to tray then your floor has sunk or the tray hasn't been correctly fitted

    Tray should be sat on a bed of tile adhesive or atleast a bag of mortar. Floor under the tray should be sound and solid, ideally replaced with 18/22/25mm plywood

    Sticking laminate boards over the top is a bodge, it still won't fix the movement
    Originally posted by andyhop
    Yes, ut had sagged. We know that.
    It is all being replaced in spring, we just need to last till then!
    • Norman Castle
    • By Norman Castle 15th Oct 16, 8:32 AM
    • 6,944 Posts
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    Norman Castle
    Gaffer tape. Clean the tiles and shower base first to remove any soap or grease. White vinegar removes grease. Check regularly and replace as needed.
    Don't harass a hippie. You'll get bad karma.

    Never trust a newbie with a rtb tale.
    • Any
    • By Any 15th Oct 16, 8:37 AM
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    could you not put a shower curtain or two on a wire and velcro/stick it to the sides at the bottom or with weights on it would hang straight so the water runs down the curtain into the tray?
    Originally posted by Bettie
    I've thought about something like that yesterday, just need to think through best way about it... as we have exposed shower rail so you still need access to that to control the shower.

    But maybe like piece of plexi glass placed at slight angle to let water run down it instead of down the wall, diverted to the tray...
    • Norman Castle
    • By Norman Castle 15th Oct 16, 8:39 AM
    • 6,944 Posts
    • 5,706 Thanks
    Norman Castle
    Don't harass a hippie. You'll get bad karma.

    Never trust a newbie with a rtb tale.
    • millie
    • By millie 15th Oct 16, 4:36 PM
    • 912 Posts
    • 319 Thanks
    We used this It was installed 6 years ago and still looks as good as new, no mould or leaks. Its not cheap but seems to work well.
    • Any
    • By Any 15th Oct 16, 5:31 PM
    • 7,572 Posts
    • 8,012 Thanks
    We used this It was installed 6 years ago and still looks as good as new, no mould or leaks. Its not cheap but seems to work well.
    Originally posted by millie
    Thank you, this looks good!
    • davemorton
    • By davemorton 16th Oct 16, 1:51 AM
    • 26,228 Posts
    • 318,481 Thanks
    If it is only temporary use some flashband. paki94BEiQAsXJMGqC6FmNAwanRyM_QtHDjnvYQfEB2isPuWeH cFlPey9IaAn6u8P8HAQ
    • googler
    • By googler 16th Oct 16, 12:48 PM
    • 14,777 Posts
    • 9,691 Thanks
    remove the tiles and use shower paneling - this is what we had done when we had a similar issue
    Originally posted by sysadmin
    That will be of no use at all if the core problem is/was that the shower tray is moving with respect to the wall, which appears to be the case.

    Big, heavy, stone base, placed upon flooring and joists which flex under the weight, and which move even more when humans step upon it. Walls stay still, floor goes down, gap between tiles on wall and tray opens up.

    • glubalub
    • By glubalub 16th Oct 16, 1:37 PM
    • 35 Posts
    • 16 Thanks
    Are you absolutely certain that the leak is coming from the base of the shower tray and not from either the waste or the cold or hot water feed to the mixer? Are there any cracked tiles/missing grout joints anywhere else in the shower where water could be running in?

    If it is definitely the shower tray tile junction that's leaking then silicone may solve the problem. As others have said silicone does have a couple of problems. Standard silicone doesn't stick to itself or anything that is wet so the joint surfaces would need to be completely dry and all the old silicone removed before the new silicone is applied to the joint. Silicone sealant remover is available in mastic tubes.

    Silicone is a little bit flexible but if there is a lot of movement in the tray then every time you stand in it you will stretch the silicone a bit and it will eventually break away from the surface and leak. If you can see more than a couple of mm movement in the tray as you step into it, then I'd double check the joiner's advice that the tray is safe

    If you decide to go down the replacement silicone route and the surfaces can't be fully dried then you can buy a waterproof sealant.
    If there are any voids between the tray and the structure it's a good idea to fill them first with expanding foam which must be completely cured and cut back before the silicone is applied to the joint. Any new silicone should be "tooled" to make sure it's firmly stuck to the tiles and the shower tray.
    If that fails or doesn't appeal then there is a waterproof tape called flashband that is designed to seal joints in roofs. I've never used it in a shower but if you're desperate it may reduce the rate at which the water leaks for a few months.
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