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[aaronjb]

I don't know a lot about it, but it should be possible to test for damp. If the source of the damp has been stopped and the surface exposed for some time then surely such a test would determine whether any further investigation is required or it's just a case of "making good".

No harm in checking the plumbing anyway, of course.

Aye, one of these: http://www.amazon.co.uk/Rapitest-RAPDTM118-Damp-Test-Meter/dp/B0001P0JZU

And just to echo what most have said - make sure it's not a leaky pipe (having just suffered similar with a leaking isolator valve underneath the bath) then when you know no more water is leaking into it get the paper off, knock the plaster back to where it's still good and get a good plasterer in.

Definitely don't waste your time trying to bodge it with polyfilla, it's just about impossible to make that stuff look good .. and plastering is more of an art than a skill so it's one of those things I definitely think it's worth paying for

[tunnie]

I don't know a lot about it, but it should be possible to test for damp. If the source of the damp has been stopped and the surface exposed for some time then surely such a test would determine whether any further investigation is required or it's just a case of "making good".

No harm in checking the plumbing anyway, of course.

Aye, one of these: http://www.amazon.co.uk/Rapitest-RAPDTM118-Damp-Test-Meter/dp/B0001P0JZU

And just to echo what most have said - make sure it's not a leaky pipe (having just suffered similar with a leaking isolator valve underneath the bath) then when you know no more water is leaking into it get the paper off, knock the plaster back to where it's still good and get a good plasterer in.

Definitely don't waste your time trying to bodge it with polyfilla, it's just about impossible to make that stuff look good .. and plastering is more of an art than a skill so it's one of those things I definitely think it's worth paying for

Yes I thought the same, plus you see that wall when you walk in, so it needs to look decent.

[paul.lovejoy]

been out of the london area for too long now so most of my contacts have dried up excuse the pun.....you could try millwall know hes south of the river 

[CaptainZok]

What no gaffatape bodge Student??

[aaronjb]

Yes I thought the same, plus you see that wall when you walk in, so it needs to look decent.

I think it's fascinating to watch a plasterer at work - I had one not so long ago to make good after a window opening was shrunk in the dining room (to match the kitchen it's now been knocked through to).. There's no way it'd have looked that flat if I did it, not on the first pass and not even on the 10th

He, on the other hand, loads up his float and voila .. practically finished in one pass 

When I do it it looks more like I'm icing a cake

[tunnie]

Yes I thought the same, plus you see that wall when you walk in, so it needs to look decent.

I think it's fascinating to watch a plasterer at work - I had one not so long ago to make good after a window opening was shrunk in the dining room (to match the kitchen it's now been knocked through to).. There's no way it'd have looked that flat if I did it, not on the first pass and not even on the 10th

He, on the other hand, loads up his float and voila .. practically finished in one pass 

When I do it it looks more like I'm icing a cake

 

What no gaffatape bodge Student??

Even I draw the line at graffer tape rather than plaster 

been out of the london area for too long now so most of my contacts have dried up excuse the pun.....you could try millwall know hes south of the river 

Not seen him online in a bit, he is the other side of London though.

[pscocoa]

http://www.advancedbasements.co.uk/

Tunnie - I used the above firm in the past - I know the owner and if you want a free of charge assessment then PM me and I will give you his mobile number

[MaxV6]

i'd say you have a leak under the bath, probably on the join to the taps...     that wall is WAY too wet for a bit of sealant leakage.

1) fix plumbing,....   
2a) leave dehumidifier in bathroom for a day or two. that wall is soaked through....   and if you cover it up will take much longer to dry properly... 
2b) strip back other side of the wall to bare concrete.  and leave it to dry , make sure you ventilate the place well....     
3) once dry,  ish...     re-tile and re-seal bathroom side.  might be as well to treat wall core for rot/mold/mildew before doing so.... 
4) once the wall tests dry properly....   (using a moisture content meter) have the wall plastered... 
5) decorate to taste.....   gaffer tape allowed at this stage.  if you must.... 

i know a seriously good plasterer lives down near Slough/Maidenhead,   he's £200 a day....  but is amazing....  and quick......     he's about a million years old,  should have retired ten years ago... but keeps going....    been a plasterer all his working life.....    i use him whenever possible for client builds....   and my own place....   

[tunnie]

http://www.advancedbasements.co.uk/

Tunnie - I used the above firm in the past - I know the owner and if you want a free of charge assessment then PM me and I will give you his mobile number

Thanks, could be interested in that once I've identified the leak.

i'd say you have a leak under the bath, probably on the join to the taps...     that wall is WAY too wet for a bit of sealant leakage.

1) fix plumbing,....   
2a) leave dehumidifier in bathroom for a day or two. that wall is soaked through....   and if you cover it up will take much longer to dry properly... 
2b) strip back other side of the wall to bare concrete.  and leave it to dry , make sure you ventilate the place well....     
3) once dry,  ish...     re-tile and re-seal bathroom side.  might be as well to treat wall core for rot/mold/mildew before doing so.... 
4) once the wall tests dry properly....   (using a moisture content meter) have the wall plastered... 
5) decorate to taste.....   gaffer tape allowed at this stage.  if you must.... 

i know a seriously good plasterer lives down near Slough/Maidenhead,   he's £200 a day....  but is amazing....  and quick......     he's about a million years old,  should have retired ten years ago... but keeps going....    been a plasterer all his working life.....    i use him whenever possible for client builds....   and my own place....

Thanks Max, it s quite wet in some sections when you pick away at it 

First things first get bath out and inspect its pipework I think

[tunnie]

I don't know a lot about it, but it should be possible to test for damp. If the source of the damp has been stopped and the surface exposed for some time then surely such a test would determine whether any further investigation is required or it's just a case of "making good".

No harm in checking the plumbing anyway, of course.

Aye, one of these: http://www.amazon.co.uk/Rapitest-RAPDTM118-Damp-Test-Meter/dp/B0001P0JZU

Ordered! As its pointless painting too early, should prove useful!   

[henryd]

I don't know a lot about it, but it should be possible to test for damp. If the source of the damp has been stopped and the surface exposed for some time then surely such a test would determine whether any further investigation is required or it's just a case of "making good".

No harm in checking the plumbing anyway, of course.

Aye, one of these: http://www.amazon.co.uk/Rapitest-RAPDTM118-Damp-Test-Meter/dp/B0001P0JZU

Ordered! As its pointless painting too early, should prove useful!   

May give you a better idea as to where the source of any leak is as well

[tunnie]

I don't know a lot about it, but it should be possible to test for damp. If the source of the damp has been stopped and the surface exposed for some time then surely such a test would determine whether any further investigation is required or it's just a case of "making good".

No harm in checking the plumbing anyway, of course.

Aye, one of these: http://www.amazon.co.uk/Rapitest-RAPDTM118-Damp-Test-Meter/dp/B0001P0JZU

Ordered! As its pointless painting too early, should prove useful!   

May give you a better idea as to where the source of any leak is as well

Never used one, so I can just point/put it on wallpaper, concrete & plaster?

[tunnie]

Just spotted some cheaper ones, as I'm at work i just ordered it quickly.

Digital one is actually less:

http://www.amazon.co.uk/Digital-Detector-Moisture-Red-Edge/dp/B004JEBDTU/ref=pd_cp_diy_3

[OOMV6]

I agree with Varche. Get rid of all the crap and replaster.
Contrary to other post, that is NOT way too wet for a seal leakage. If it has been like it a long time, bathroom used constantly, it just gets wetter and wetter with no chance to dry out.
You have to get off ALL affected plaster, and maybe more where the concrete underneath may be damp but not yet soaked the plaster. So you'll need to chisel away the plaster until you find dry concrete.
Then the concrete must be dry before plastering. Circulation of cool air, by leaving windows open or even a fan (which will make the place smell a bit).
Once dry, replaster. DO NOT use the damp stuff you proposed. All that happens is it will disguise any future problem you may have. If damp does start again, it will not penetrate it and so will find another way. Maybe popping tiles eventually in the bathroom.

Obviously important to rule out any pipe leaks the other side, and remember that the seal around the bath is never a forever thing. If and when it starts to come away in years to come, deal with it.

[cem_devecioglu]

I bet there is a leaking pipe.. my neighbour had.. and damaged my walls 
 
break the wall , find the leak and change the pipe with plastic type.. and then fitting all is the reverse of removal