Our bathroom has two outside walls. One faces west and gets the prevailing rain, the other faces north and is slow to dry out, so generally that corner is something of a 'cold spot', not helped by it also being the corner with the WC and hence a large cistern full of cold water.
Originally we had a lot of trouble with condensation and black mould, so fitted an extractor fan in that corner - some improvement. When we redecorated we lined the walls with 2mm polystyrene insulation - a little bit more improvement. Next time around we renewed the polystyrene and then papered with blown vinyl - even more improvement, but still a lot of mould appeared over time, mainly at the joins between the adjacent wallpaper sheets.
The main problem with the blown vinyl paper is that the surface has proved to be very delicate. If (say) you reach for a towel on the towel-rail or go to pull on the toilet roll and misjudge it and catch the wall with your finger, then a chunk of the paper surface comes off. Similar if you happen to bump on a corner or rub against the surface when cleaning etc. End result is that the walls are pock-marked all over with damaged patches :-(
So, two questions please:- (1) What is the best way to tackle the cold wall/mould problem and (2) what's the best sort of wall paper to use (is there a stronger type of blown vinyl perhaps) ?
Thanks!