I'm getting some penetrating damp on an interior wall. In pretty much exactly the same spot on the outside wall is this.
The top brown pipe comes down from the guttering around the roof and the others carry waste water from the bathroom - not sewage, just the stuff from the sink and bath.
Is it possible that this is overflowing? Some of the pointing behind it isn't in great shape either.
Should I replace it, or is there some other way of sealing off the wall?
All suggestions greatly received.