Discuss What could be causing this? - damp behind tiles? - wet grout in the Tiling Forum | Tile Advice area at TilersForums.com

It looks like water seapage coming through the grout, but cannot feel any wetness. Water pipes are below the tiles pictured. Could it be dampness behind the tiles through poor prep work?. I don't know to be honest, so am purely guessing from logic. This first appeared 2 days ago. (Part of an ongoing issue with poor workmanship/prep work)
 

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Paul C.

TF
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Is the discolouration permanent or does it dry out back to its normal colour? Is it in a shower area?
 
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Is the discolouration permanent or does it dry out back to its normal colour? Is it in a shower area?
This is new discolouration. It looks like it is wet, so unsure if moisture behind the tile. So far, it has not dried out. There are other areas of discolouration that have been there for a couple of weeks and has been raised. These are new.
The shower is not yet installed.
 

Paul C.

TF
Trusted Advisor
Tilers' Arms Member
If the shower hasn't been used, it's more likely to be inconsistently mixed grout, maybe too wet or washed too soon, or washed with too much water releasing pigments. Take a bit of medium "wet and dry" and gently sand a small patch, see if it goes back to the intended colour, and if it does, keep an eye on it and see if it goes dark again. I think if it was water behind the tile, it would more likely soak the full width of the joint, not just down the sides of it.
 
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If the shower hasn't been used, it's more likely to be inconsistently mixed grout, maybe too wet or washed too soon, or washed with too much water releasing pigments. Take a bit of medium "wet and dry" and gently sand a small patch, see if it goes back to the intended colour, and if it does, keep an eye on it and see if it goes dark again. I think if it was water behind the tile, it would more likely soak the full width of the joint, not just down the sides of it.
Tiler is coming back tomorrow for 2 days under instructions, so will see what happens. (not much hope anything will change for better, but...)
 

acaciaguy

TF
Tilers' Arms Member
I agree with Paul c. If it was a leak it would be wider spread and you would need to take a tile off to investigate. What are the other issues? Are the other places with similar grout issues
 
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I agree with Paul c. If it was a leak it would be wider spread and you would need to take a tile off to investigate. What are the other issues? Are the other places with similar grout issues
The whole bathroom needs ripping out and starting from plastering the walls to make flat, as should have been from the start. Not doing that has left lippage all over, uneven tiling, badly fitted trim, badly cut tiles, uneven tile spacing etc... :(
 

acaciaguy

TF
Tilers' Arms Member
The whole bathroom needs ripping out and starting from plastering the walls to make flat, as should have been from the start. Not doing that has left lippage all over, uneven tiling, badly fitted trim, badly cut tiles, uneven tile spacing etc... :(
So sorry to hear that. Where are you based?
 

acaciaguy

TF
Tilers' Arms Member
I specialise in rip outs ( a lot here do so I’m not boasting) back to floor and walls for re fits. To be honest. It’s the best way in some situations. I’m in Warwickshire but you will find someone great in this site.
 

acaciaguy

TF
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could you give more details as to what you want to be done. Pictures and a description of walls etc.
 
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I specialise in rip outs ( a lot here do so I’m not boasting) back to floor and walls for re fits. To be honest. It’s the best way in some situations.
I agree, I think the only way to get the tiling done correctly is to rip it all off, plaster the walls flat, not leave old adhesive, blown skim and good skim then spray it with some sort of bonding - then 'mark' the room square virtically and horizontally then set the tiles and this time, apply the tiles onto a nice flat surface.
 
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  • #18
could you give me details as to what you want to be done. Pictures and a description of walls etc.
Still going through the legal processes at the moment. Until 'redo' work has been carried out, next stage cannot be initiated.
 

acaciaguy

TF
Tilers' Arms Member
Strip back to brick. Then either dot and dab appropriate plasterboard or use a cement board. You can batten wall out too. Don’t bother with bonding and skimming
 

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