On Sunday, 13 January 2019 17:14:05 UTC, Alan wrote:
I have a middle floor flat in a block of six,on a gable end the kitchen was
decorated about 8 months ago.we now have signs of damp for about 4 foot along
the wall rising from the skirting showing black marks but not damp to the
touch also down the side of a tall kitchen unit which sits about a half inch
of the wall.Any help would be appreciated.

http://wiki.diyfaq.org.uk/index.php/Damp


NT