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PostPosted: Thu Mar 02, 2017 3:01 pm 
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Hello,

I have had an on going problem with darks marks that won't seem to go away. These marks are not wet, greasy or even colder than the rest of the wall, you can simply just see them. They were improving and going away but have recently appeared again (Not after rain, just generally cold weather). The never grow or change in size or appear any darker than they originally did but they have just reappeared in the same place. The area underneath and to the left of the beam is plasterboard, to the right is the chimney breast.

We have had various work completed.
:-This started off with having the wall taken back to brick with a salt neutralizer adding to the brick and left to dry overnight. A plaster coat applying to the area that was stripped back to brick and then a skim coat applying to the chimney wall and plasterboard area connected to the chimney wall.
:- We have had the chimney repointed, chimney cowl checked and confirmed there is no problems, lead flashings and underfelt completely redone around the chimney. This appeared to solve the problem but it has shown again in the exact same place. (I have had 5 separate roofers check the work who have all said how well the work has been completed and they can't see any problems.)

Does anyone have any idea what this could be? (a leak still, condensation, salts somehow still (Despite the salt neutralizer).

Any advice or even guesses would be appreciated.

Please see attached pictures.

Thanks,
Andrew.


Attachments:
File comment: After 4 and a half weeks
4 and a half weeks later.jpg
4 and a half weeks later.jpg [ 86.94 KiB | Viewed 584 times ]
File comment: After 4 weeks
4 weeks later.jpg
4 weeks later.jpg [ 75.45 KiB | Viewed 584 times ]
File comment: After 3 weeks
3 weeks later.jpg
3 weeks later.jpg [ 84.68 KiB | Viewed 584 times ]
File comment: After 2 weeks
2 weeks later.jpg
2 weeks later.jpg [ 85.52 KiB | Viewed 584 times ]
File comment: How it was originally as it started drying
Original.jpg
Original.jpg [ 71.93 KiB | Viewed 584 times ]
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PostPosted: Fri Mar 03, 2017 8:19 pm 
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It looks like damp following the lines of the bricks, I would double check the flashings directly above where it seems to start. Also check the crowns and tiles /slates. Try painting it to see how it reacts. Should it start flaking you know it's damp. Do you have a chimney vent?

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PostPosted: Mon Jul 24, 2017 10:52 pm 
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Is it a working chimney? How many pots are on the stack in question? Are they all covered at the top and ventilated in the room?


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PostPosted: Wed Aug 02, 2017 7:04 pm 
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Joshy88, I doubt you will get a a reply from hoyle23, the post was made 5 months ago (look at the post date) and that was the last time he / she posted.

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PostPosted: Wed Aug 02, 2017 7:19 pm 
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someone-else wrote:
Joshy88, I doubt you will get a a reply from hoyle23, the post was made 5 months ago (look at the post date) and that was the last time he / she posted.



You are obviously correct. But someone-else (No not you) might stumble across this thread and find it useful.

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PostPosted: Wed Aug 02, 2017 7:59 pm 
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I beg to differ, because in this case Joshy88 asked a question, but I doubt he will get a reply, which in turn helps........

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