Since the last post, we have become weathertight with the last set of windows now up. The black of the title refers to the Resitrix rubber roofing which now covers both roofs.
And the blue refers to the Siga Majvest blue rain and wind proof membrane that has been used to wrap the house up like a birthday present. This photo is of the North side where the front door is. Since the photo was taken small windows have been cut in the fabric, but quite a different look from the brown sheathing boards.