How can I fix this hole?
Hey, any help to a total noob is greatly appreciated.
New build, en-suite started getting mold on our ceiling, which we assumed was down to ventilation so we started opening the windows etc.
Recently a small brown wet patch appeared next to the tiles in the shower, which has slowly grown. It was very wet and collapsing on its self when touched. I emptied the wet bit out of the patch and everything else around it is dry.
I have 2 questions, how can this happen in such an isolated spot? And how can I fix this?
Thank you!!