OK, I am clearing for my house, and stacking wood in 4' to 8' lengths. It will be shortened and fractured (the cottonwood at least) w/in the next few years, and kept dry till burned. Building will take 2 or 3 yrs, and I am sure I will have access to more trees that I will want to snag to stock pile. I know the wood will burn 20 yrs from now, but at what point does it start to lose its horsepower appreciably? I don't want to get too greedy and keep wood if it is going to dry rot, when I could have sold it. Thanks. j