I think the Damp forum is the best place to post this, but here goes!
I bought an 1890 terraced house in the summer and now the horrible damp winter is setting in there’s a couple of places where damp is an issue, most of them I can see what the problem is (cracked render outside etc) but in the back upstairs bedroom there is a damp patch in one of the alcoves next to the chimney breast (closest to the outside wall).
I went up in the loft to have a look and see if I could see water getting in anywhere and there’s no sign, however I did find something…
Both the front and back bedrooms have chimney breasts which meet up in the loft, at the end of the sloping section towards the front bedroom there is a large void about a foot square and 3 or 4 ft deep and apart from a brick in the bottom its empty:
empty.jpg [ 126.82 KiB | Viewed 53 times ]
However the end above the damp bit seems to be completely full of general building detritus and rubble:
photo (3).JPG [ 165.22 KiB | Viewed 53 times ]
I can guess what the answer might be, but whats the chances that this is likely to be at least part of the damp problem up in that corner?