Thanks for your reply! Yes, that's a valley going into the guttering then. That does sound like the most logical explanation. I'll get someone round to look at it
Hello! I recently moved into a flat and a damp patch has started coming through under the window sill. Looking out the window, it looks like a drip is coming down from the gutter and landing on the window sill, and then dripping down from the window sill. I initially thought the gutters might be...