I live in a basement flat and we've recently started getting a damp patch appearing on a wall at the front bay window, which gets worse when it rains. The rain doesn't actually hit the exterior wall since it's covered by the above flat's window sill, but there's a damp patch in the same place on the exterior wall, and no where else.
There's no water pipes nearby but the part of the patch is around the hole for the virgin tv cable, though I've sealed that and there doesn't seem to be an improvement. it's also just in the middle of the wall, not at the bottom or the top. Didn't have this problem last winter and nothing has changed so can't think what could cause it.
Does anyone have any ideas what could cause this?
Thanks
There's no water pipes nearby but the part of the patch is around the hole for the virgin tv cable, though I've sealed that and there doesn't seem to be an improvement. it's also just in the middle of the wall, not at the bottom or the top. Didn't have this problem last winter and nothing has changed so can't think what could cause it.
Does anyone have any ideas what could cause this?
Thanks