We have a damp patch in my daughters bedroom, that is in the middle of the wall. It does NOT touch the top (all our gutters and soffits were replaced last year), but part of it does go towards the window. It does get bigger when it rains. It is currently about 3ftX3ft. I have checked the loft and there is no leak in the roof that I can see. Could this be coming through the wall. If so, who do I call in to get this looked at? Any ideas?