Penetrating damp

Niv

stuart45 said:

The pointing looks OK. It's a cavity wall, so inner skin should be protected anyway.
Mortar droppings on the ties, or in the cavity above DPC can also cause a few damp spots. 
Bricks look like Edenhall, which are more prone to shrinkage cracking.

I can see a bit missing from the picture, which is why i mention it.

Good shout on the cavity wall comment, living in a 400 year old house I sometimes forget about that!

stuart45

Cavity walls work well if constructed properly. However, when poorly constructed they can cause damp problems. Mortar snots on the inside of the face work are often left. When water runs down the inside, it can run to the centre of the cavity, bounce off a wall tie, and go into the inner skin.
The theory of a cavity wall means that penetrating damp and condensation in the cavity won't cause any issues, but in practice they aren't always well built.
The wall ties lower down the wall are more likely to collect mortar.

sp3rk386

If edenhall these tend to be quite porous, trying to work out where corner is from photos?