Signs there is more investigation needed, this is the floor in the hallway behind the bathroom, notice the cracked board, the discolouration and water stain.
Testing the moisture level 'outside' the shower.
This test suggests there could be an issue with moisture in the wall cavity.
Any abnormal moisture reading to the 'back' of the shower wall is a sign there is more investigation needed
Tell tale signs that the shower grout and possibly something else is leaking. A small leak outside the shower could mean a bigger leak in the wall or behind the tiles.
Correct backblocking of ceilings
Ceiling cracking due to poor reinforcing behind sheets
Ceiling cracking due to poor reinforcing behind sheets and possible settlement of wall structure
Ceiling space under a roof, an area where many inspection companies won't visit.
New work to an old building
Removing render to expose brick, saving a fortune on repairs to a wall and achieving a contemporary feel in an older building