This time last year we opened up our chimney breasts and installed two stoves (SS flues, back filled with vermiculite and the chimney sealed at the top with a raised cap)
Prior to opening up the chimney breast we had noticed a damp patch on the wall where water had been getting in from the top and catching on a ledge within the chimney.
No water now gets gown the chimney - well certainly not to the bricks - but we still have two patches on the wall that "come up" occasionally - weather dependent (muggy) and when we have been cooking (steam).
I would describe these patches a humidity related rather than damp as we are sure no new water is getting to them plus they stay at a constant size.
We thought that these would dry naturally but it seems this is not the case.
Can anyone advise as to how to perhaps tackle these? I don't necessarily want to just seal the wall as I would prefer the moisture come out first!
Help 🙂
Ensure better ventination in the house? If it is humidity, then the source is generated in the house. Open a window when cooking.