We live in a terraced house which was built around 1920’s. I don’t particularly know of any dpc history but the house was rendered on outside about 2 years ago. We have wet patches on our wall but starting midway up the wall above the rail; this is an outside wall. We have checked airbricks, rendering and gutters but there is nothing obvious to suggest why water is coming in. Everything I have read about damp etc goes on to say it rises from the bottom, which ours doesn’t. We suffered last winter with condensation but as it’s our first house we didn’t realise what damage we were doing so since then we have vented the house, open windows everyday, don’t put washing on rads, have the extraction fan on while cooking dinner (open plan living/kitchen area) but now this has started happening, I don’t see how it could be condensation again……….any ideas what this could be??