I'd appreciate some advice, if anyone's got any. I've just noticed a patch of damp in a bedroom wall, at about knee / waist height. I'm pretty sure it's being caused by the join between the pipe from the sink etc in the kitchen and the stack pipe, as indicated by the red arrow in this photo:
awwkward access there - never a window where you need one!
It could hopefully just be blocked / slow / fatty - have you noticed any draining problems/ slowness in the sink?
I'd appreciate some advice, if anyone's got any. I've just noticed a patch of damp in a bedroom wall, at about knee / waist height. I'm pretty sure it's being caused by the join between the pipe from the sink etc in the kitchen and the stack pipe, as indicated by the red arrow in this photo:
https://www.flickr.com/photos/91964179@N06/16214429945/sizes/l
What's the best way to go about fixing it? We're on the second floor so it'll need a large ladder.
Here's the damp (not easy to get in shot)