HELP: Patches on plaster - Damp?! :(

Newuser0

stuart45 said:

You can also get hygroscopic salts coming through into the plaster from flues, which attract condensation.

Ahh okay, I take that’s remedied by putting in an internal vent? 

Also, if I were to put a vent internally, would I need to find the redundant flue and put it on that one? 

Thank you 

stuart45

Unfortunately the plaster needs to be removed and a salt retarder added to the new mix, if salts are a problem.

Newuser0

I’ve taken a few pics of the roof from the loft.

I think I’ve taken pics of where the chimney meets the roof.

Newuser0

Update on this thread.

Since the last time I posted, I’ve had the flashings changed with new lead, new lead soakers, new back gutters and flaunching on top. It was great for a couple months but now the rains started again new patches have appeared in a different spot. It now is on the same wall but where the wall meets the ceiling. 

I have spoken to the roofer who has come out and said he can’t see where the problem is as it’s had everything new (the back gutters were put in new FOC as new lead didn’t resolve the issue). I’m now at a loss as to what to do because this new problem wasn’t here previously, it appeared after the new gutters/flashing were put in.

The roofer is suggesting I get all the mortar between the bricks taken out and re pointed because apparently it’s very brittle. I can’t see that being the problem purely because there was no water ingress on that part of the ceiling prior to the work commencing.

any suggestions guys? 

I’ve attached a couple pics.