The shed project - Part 2

Following on from this thread,
http://www.renovateforum.com/f83/shed-project-110737

Holy dooley, it's been over a year since I've made a post about the shed, time does get away from you sometimes. As it's so old, I couldn't post a reply in that thread, so I had to create a new one.
Anyhoo, I've run the bubble wrap insulation over all the walls and the ceiling, run all the wiring inside the shed. I even managed to score a plumber from around the corner who owns his own digger who dug the trench to run the sub mains in, woo hoo.
I'm ready to put some lining boards up inside, and I was thinking of 12mm ply. Prior to putting the lining up, is there any need to paint the rear and edges of the boards? I read somewhere that it helps to prevent the ply from soaking up moisture from the gap between it and the external colorbond sheets, but I've also read that you shouldn't paint the bottom edge, as that is the only means of escape for any moisture that does manage to be absorbed. Can anybody shed (no pun intended) any light on this for me please?
Thanks for looking,
Steve.


Read the full thread at RenovateForum.com...