We've just had an extractor fan fitted in our bathroom that goes through the ceiling then out through the wall higher up in the loft. Question is, is it normal to have water coming down the outside wall. I assume its just condensation drip and it isn't much at all, but just a concern. As it's 30c then hitting the cowl vent thats -3, condensating and running down the outside. There is no evidence of damage or water in the loft. I also noted looking from the other side some patches reflecting in the sun. Again no internal signs of anything and wonder if this is previous work before we bought. They wall insulation installed and looks like maybe where they have painted years ago.