Nice work Wulf!
My woodworking is a combination of a helpful father and too much reading!
Thanks for the notes:
1) My roof is sloped as much as yours, and probably just as deep, but I have used a waterproof lining to create a little pool of water at the bottom of the slope. This should feed moisture to the earth, I'll be sure to post results up on it.
2) My shed was looking like yours for two days, using some tarpaulin to keep the water out whilst I waited for an opportunity to get the roof finished. It made a lot of noise with heavy rain falling on it, and also blew everywhere - where I live is very windy so it's not good! Fortunately, I got the roof finished today, so I don't have to use the tarpaulin anymore. One more sunny day when I'm not in work and I'll have the doors on and everything finished!
Here's the work done today:
The roof is 3 small pallets fixed together.
I created a drip edge underneath with a quarter round floor edge so when the waterproof membrane is fixed around, it will allow the water to drip off at this edge.
I also got the waterproofing on, but it was dark when I finished, so didn't get any photos! I'll probably post those photos up when I finish the doors.