Postby Joe » Fri Dec 16, 2011 12:46 pm
The problem is not the contour of the bottom of the boards and the ground, but the height of the top. If you want 4" of ice at a minimum in your highest area (and you do), with a 24" slope, that means the water will need to be at 28" in your deep corner. If your boards are only 24" high, what will happen is the water will overflow onto the ground outside your rink with hardly any in your high area. A very common, but potentially rink-ruining issue. You need to increase the height of your deep end boards to accommodate the extra water height you'll need.
As for the layers vs all at once....go all at once. It will freeze from the top down and it's not uncommon to skate on a floating slab. Ever skate on a pond or lake? They freeze from the top down too and it doesn't affect their ability to hold weight once it gets cold enough.
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