I stacked some wood in an area that get's really direct sunlight early this spring. We went into a stretch of pretty dry and hot weather in late June to early August I noticed something really particular with my wood pile. The front of the pile that got all the direct sunlight dried so fast that it quickly lost much more mass than the back of the pile. The pile began to curve over like a "C". Part of it fell over and I had to try my best to re stack the rest of the oddly shaped wood. Is this common?