Water in the tank
Some of the large branches that I put aside from the felling of the red gum found a good home, forming the entranceway to both the garage and front decking. We got a local welder to make up some brakets using old galvanised water pipe from the site, and a metal bar that I'd collected from the brick cleaning. The metal bar slots into both the pipe and the base of the pole, which was cemented into the ground, giving it a stable foundation which was braced from above using box beams. The box beams taper off, giving them a japanese / aussie bush look - just what we were after (my partner is japanese).
Galvanised corrugated iron was used for the roofing. The long lengths bent nicely into shape on the roof battens mostly by their own weight. A licensed roofing plumber is legally required to fit the roof and guttering.
The curved roof is both elegant and practical. The roofing was put up in one day, and because of the aerodynamic nature of the design it provides good protection against ember attack during a bushfire. Gaps in boxed eaves are serious problems because embers can settle in them and ignite the roof cavity - having open eaves nullifies that risk. Open eaves are also beneficial during heavy rains, as overflowing gutters cannot run into the house structure.
Fascias were pre-painted and set up on props, allowing the roofing to be screwed into place. When the props were removed the overhang has strength enough to stand on. The eaves are open, so there's no risk of fire or flooding in them.