P
philibobs6
hi mate,based on what you have said personally i would rip it out and start again,,right back this time as well. remove the ply if possible and replace with plasterboard,ply on walls can cause all sorts of problems esppecially in moisture laden bathrooms.
also do you have anty ventilation in the room like an expelair as this may also be why your Silicon is turning mouldy as moisture has no way to escape
there are lots of good mould resistant silicones out there
Just hve the bathroom window for ventilation, the bathroom is quite big nearly a single bedroom in size, the rest of the bathroom wall the other side has been re plaster boarded, as this wall was a real mess in its time.
Not looking good as the ply wood is the airing cupboard of where old water tank was, so doing this would be a big job, to replace one wall, inless i just replaster boarded over it, but probably making more mistakes and bodges, any other ideas, or adhesives grouts to use or methods than trying this,