Here is a picture of an internal wall (staircase) in our house.
Aside from the superbly drawn arrow and "bugger" looks normal right? Wrong! The arrow points to something that I noticed this morning and had assumed was someone being clumsy and spilling some water/baby milk/whatever when going down the stairs.
It was gone when I got home from work so no biggie I thought. Wrong! It has just reappeared after I've had a shower. It now occurs to me that when I saw it this morning it was also after I'd just had a shower.
My investigations reveal that I'm indeed clean, smell good, shower regularly and that the drain for the en-suite bathroom is located directly behind where this leak is apparent (opposite side of the wall obviously).
Now the drain's not overflowing or anything like that so the only thing I can think of it that it's leaking within the wall itself - all the pipes/conduit/etc having been sealed in during construction.
Any Chiang Maiians now of a good plumber that will tidy up the chucks of concrete after he has had to knock a hole in the wall?