ghosting

I recently moved into a three story semi-detached town house that's rendered in monocouche. When it's raining/rained there's clear ghosting visible, there's also multiple cracks, mostly on the ground floor level under windows, with one big one travelling up the wall in a zigzag pattern on the...

Hello, I'm new to this forum so hopefully this is the most appropriate place for this thread! I'm looking to buy a top floor flat, my only concern is some dark marks on most of the walls (internal and external facing) and ceilings. The external facing walls seem to have marks that correspond to...