Hi,
I have started removing plaster from a wall showing signs of damp (tide/water marks and peeling paint at base of wall), 1900 house. Solid brick internal wall. Concrete floor. Moved in six years ago and had done damp work carried out to a number of walls. This wall had chemical injection to other side and replastered on other side of wall.
What is that black stuff likely to be I’m seeing along one section of the wall?
I have started removing plaster from a wall showing signs of damp (tide/water marks and peeling paint at base of wall), 1900 house. Solid brick internal wall. Concrete floor. Moved in six years ago and had done damp work carried out to a number of walls. This wall had chemical injection to other side and replastered on other side of wall.
What is that black stuff likely to be I’m seeing along one section of the wall?