I recently moved into my property (July 2024). Had various snags and problems etc...
Now it's got to the colder part of the year I have noticed at the rear of the property on the external wall of the house is a damp line. It doesn't seem to disappear and has been like it for 3 weeks now.
Does anyone have any ideas of what it could be?
It doesn't travel the entire way up the wall and no further marks anywhere else.
For reference this is the RHS Rear brickwork. Would be very appreciative if anyone has any ideas.
