Soggy Mouldy Plasterboard Behind Tiles

[simisworkshop]

Hi there,
Can anyone help?? We are going through a nightmare with our tiling job in the bathroom around the bath & shower enclosure, which I think was competed about 10 years ago - But it wasn't until we bought this house that we noticed black mouldy residue (some of which resembled shaving foam) on the lower section of the wall in our bedroom, the other side of which is the tiled wall in the bathroom - So we thought some of grouting must has come away allowing water to get through & penetrate the wall when having a shower. So we grouted & siliconed but the problem persisted.
We are now confronted by the tiles, especially the ones on the first 2 rows from the bath itself, coming away from the wall with soggy platerboard.
We are not in a position at the moment to retile the entire bathroom which would be a massive job as the tiles are ceiling high & was wondering if their is anything we can use in the meantime that will at least keep the tiles stuck on the wall - We have replaced several sections of the plasterboard by screwing them on to wooden battens as there is no other support, but it is still leaking, & the plasterboard walls behind, are obviously still very wet, nightmare!!!!
Can anyone help, please, I'm dying to be able to use my shower again - Baths take too long!!

Any useful help would be greatly appreciated
Regards

[chille]

can you just clarify a couple of things

Have you replaced the lower part of the plasterboard and then re tiled it?

Have you removed any of the tiles higher up to see the extent of the water damage?

Is it only the wall at the end of the bath where the shower is fixed that is damp?

[simisworkshop]

Hi there,
Thanks for getting back to me.
We have sort of replaced the plasterboard in sections thinking initially that only one square needed replaced, which unfortunately was untrue.
No we have not removed any of the tiles higher up as they seem secure - its the ones lower down that are not secure - We just want something to temporarily prevent this leaking.
The wall above the bath taps & at the side of the bath, which is the adjoining wall to our bedroom, are damp.
In fact my husband just went to Focus DIY to purchase BAL adhesive but they did not stock it.
Many thanks

[TilingLogistics]

Originally Posted by simisworkshop

Hi there,
Can anyone help?? We are going through a nightmare with our tiling job in the bathroom around the bath & shower enclosure, which I think was competed about 10 years ago - But it wasn't until we bought this house that we noticed black mouldy residue (some of which resembled shaving foam) on the lower section of the wall in our bedroom, the other side of which is the tiled wall in the bathroom - So we thought some of grouting must has come away allowing water to get through & penetrate the wall when having a shower. So we grouted & siliconed but the problem persisted.
We are now confronted by the tiles, especially the ones on the first 2 rows from the bath itself, coming away from the wall with soggy platerboard.
We are not in a position at the moment to retile the entire bathroom which would be a massive job as the tiles are ceiling high & was wondering if their is anything we can use in the meantime that will at least keep the tiles stuck on the wall - We have replaced several sections of the plasterboard by screwing them on to wooden battens as there is no other support, but it is still leaking, & the plasterboard walls behind, are obviously still very wet, nightmare!!!!
Can anyone help, please, I'm dying to be able to use my shower again - Baths take too long!!

Any useful help would be greatly appreciated
Regards

What you can do is to tank the whole area with BAL WP 1 Tanking or Equivalent. It will look awful but it will effectively waterproof the area until you can get round to sorting it properley. I would however advise that you call a professional in as the problem sounds as though it was due to the area not being tanked in the first place.

I hope this helps

Kev

[chille]

I wouldn't waste your money on any adhesive until you can find out where the damp is coming from, if you tile on damp substrate then it will not adhere and if you have water getting in elsewhere then the new tile adhesive will not dry and the tiles will fall off again.

Why not just make a feature around the bath, remove all the tiles and plasterboard put up hardi backer board then tile can't be anymore than 6 sq m of tiling and you can get back to normality.

If you keep trying to bodge it then you will just throw good money after bad at the problem, then still end up doing it right.

As an alternative you could just buy some Aqua board and fix over the tiles finishing with a trim, cant think of any other solution sry