Rewriting History

A curved flat roof prevents water accumulation

Back when Christopher Columbus first discovered that someone else had already discovered America, all the "experts" thought that all buildings should be flat. But after each heavy rainfall, these flat roofs had chronic leakage (the earliest form of domesticated running water). Then, when the Wright Brothers took their maiden voyage, their maid discovered that all this unwanted roof rain retention might be solved by curving the roof to emulate the earth's horizon. Now, normal flat roof construction has added a curve (or "convexation") thus allowing all the rain run-off to come down in a controlled area and be routed directly into your garden or fish pond.