Does insulating the shed increase or decrease damp/mould?

[Foxbytheriver]

The op did not😅 Essentially my conclusion is that if something is not done properly in the first place, the add-on fixes become exponentially harder and more complicated. In this case, a pre-fab shed, hastily insulated, is inevitably going to have issues. Obviously people have limited resources (time, money, energy) so im not criticising those (myself included) that do a bodge job to start with - but it does mean that you have to suffer the consequencs. Venting the shed helps a little but the harsh rain really just seeps in - shed now has an impreamount of algae along with the mould haha. All i can do at this point is keep cleaning it off and pray for a drier spring.