Following bathroom refurb have found cracking in plaster in adjacent bedroom from vibration/cracked blocks in internal wall (non supporting), where all plaster on bathroom side was hacked off. Have now found hairline horizontal crack about 1/4 way up wall which is about 1m wide in the adjacent (bedroom) side. This is on the short length of an 'L' shape, where the long length forms the main wall between the bathroom and bedroom. What concerns me are the amount of chases now in the 1m wide section of wall (ends in bathroom doorway). With old bathroom layout I had a shaver socket (no longer used as this is now where bath is) and light switch on bedroom side. I now have chase for shower pipe coming down from loft, chase for data cable in conduit for digital shower, chase for light/fan switch - although this is outside the bathroom, the chasing is inside. With this amoount of vertical chases I'm now worried the wall is still retaining its integrity. Also the wall has now been plasterboarded over and fairly large/heavy tiles on the board, plus there is a heavy bath screen screwed through the tiles/board/wall. All in all probably a lot of stress on the wall and bit channeled out of it by the bathroom fitter.
