I have a small damp patch which has recently appeared in my vestibule and is becoming progressively worse. There is now a black stain on the wall which is getting larger and paint has been flaking off (see photographs). It’s quite cold in this area as I have an original wood front door that is quite drafty.
Obviously I would rather not chip off all the plaster and treat the damp in the usual way. So I was wondering if anyone would recommend a treatment for this such as maybe Zinessa or another damp sealant?
Any help would be much appreciated.
Thanks