10-02-2013, 11:43 AM
You can avoid all of the problems with a geodesic dome by makiing a true shell out of ferrocement. Look at this image http://pacificgunite.com/ferrocement.htm This dome is water tight. It has a vent at the top to allow the hot air to escape. The little "eyebrows" over each arch are gutters that direct rain water to collector pipes embeded in the concrete columns. There is a 3' overhang around the perimeter that could easilly be larger. The roof doesn't leak and will last for more than a lifetime. When my engineer visited the job he told the owner that he would be coming over to her dome if there were ever a hurricane warning.