I have another theory on that besides good looks. A regular sloped pile is too aerodynamic and as such the air tends to just skim over the top. A pile with stacked sides presents itself as a vertical face to the wind and as such the wind is channeled into the stack. The same stacked sides reduce the amount of sprawl so the core closer to the ground is not as far from the surface and the wind more apt to reach it.SolarAndWood said:LL's stack around the pile keeps it looking much more tidy if appearances are an issue...