I am hoping some one can help as we are running out of ideas. The house is old we moved in in June . After a week or two we noticed small wet/damp patches on the bedroom wall where the chimney is. The chimney has a oil fired central heating flue running up it. We suspected a leaking roof so a roofer came and renewed lead flashing suspect tiles recemented the chimney pot and fitted a rain cap. None of this has helped. The little patches are now big. I have had a dehumidifier on 24/7 heating on /off windows open/closed to no avail. The attic is dry the pointing on the outside wall is good. Where is it coming from??
If you type the key words of your question into our search box to the left of the site you may find the answer is already posted or is in the DIY projects section of the website. Every post goes through a monitoring process and using the search box may speed up your answer.