This might be the end of my disquisition on tarps for now. It stopped raining, got some more pictures, found some more conditions, shall think about them for a bit. They have so many applications, from storm walls to weed killers. Most are blue, some are silver and really beautiful. They are the foreground to many glorious touristy views, the background to the back yard. They appear where unnecessary, they are slowly buried when forgotten.
With weather comes architectural adaptation. We have been taught the traditional responses to weather: the tight roofs on the Nova Scotia shore where any roof with an overhang would be ripped off by horizontal Atlantic winds, the deep eaves on the west coast which protect the walls and the foundation from quietly endless vertical rain. The steep metal roofs of Revelstoke shed great snowfalls into the sideyards; the prairie two-storey frame house, an almost perfect cube, has an extremely low surface to volume ratio, minimising heat loss. These are the broad strokes, none of which prepared me for the finer grain of tarp culture.