Just had all of the upstairs thermal plasterboarded and plastered, except the window reveals, normal gyprock had to be used as space on thw window frame was an issue. Now the reveals and bathroom ceiling going mouldy, what could be the cause of this and is there an easy fix, save ripping out reveals and trying to squeeze a thermal board on them, then having to re anglebead and skim the whole window wall? There does seem to be more condensation since install of thermal boards and I keep the house hot which does not help.
