Cheers for the reply, Burnerman.
I think I'm going to try to increase the ventilation as much as possible - add vents at the top of the roof (near the wall) and down at the foot of the timber wall, and possibly seal the eaves...
Hopefully my timbers won't rot!
Good day to you all.
I have a lean-to outbuilding, which was originally roofed with ply decking and torched on felt.
This summer I removed the rotten ply, replaced any rotten rafters and purlins, and laid the roof with Coroline sheets.
It is now soaking with condensation :x
Have I...