If you're building a house using brand new technology and it seems like you're spending a lot of "build" time standing, staring and walking in circles, I have some advice for you: don't mount a camera above the scene to capture exactly how much time nothing is in fact being built. I'm a photographer, so it seemed like a good idea to mount a Canon 1DS Mk II with a Canon TC80N3–remote controller to make a picture every eight minutes, eight hours a day, for 14 days. During the build I never reviewed the pictures; I just changed out the CF cards and backed them up.
Why bother with an unsightly and inefficient flat tar roof when you can look out the window at a teeming green garden? That's why I'm turning part of my roof green. I'll post more detail about what I'm growing and the DIY tray-based system I'm growing plants in, but before any of that can happen, the roof itself needs to be prepared to hold several inches of dirt without collapsing or flooding my upstairs. For that, I went with a multi-layer system: insulation, rigid roof board and a thermoplastic barrier.