Plastering & Rendering

Damp area in ground level bathroom - damp expert stated likely to be caused by lightweight plaster

Anonymous user 23/02/2024 - 2.47 PM

Hello. We had a new ground floor bathroom fitted back in April and in the last couple of months a damp patch has appeared on an internal brick wall - above the tiles. A damp expert has been round and has confirmed that it is not rising damp and that it is likely to be caused by a lightweight plaster being used and the wall not drying out sufficiently. He recommended removing the plaster and rendering instead. We contacted the company that fitted the bathroom and they advised that render would be too thick (possibly extending over the tiles) and have not had any problems with the plaster before. We have been using a dehumidifier for the past week and this does dry the area out, however the damp patch appears worse again after showering. The bathroom does not have any windows and is at ground level. The other side of the internal brick wall is rendered and does not have any visible issues. Any advice is much appreciated so many thanks in advance for all your comments. Rachel Thanks David - the pipes are in a different place to the damp patch and its the opposite end of the room to the enclosure/screen. The bathroom installers considered the pipes when they revisited & confirmed its not that.