I'm going to make my own cork roadbed from locally available cork boards. I have access to one that has the same thickness as common cork roadbeds. My problem is how to slope the edges. So do you have suggestions?
Also, am I correct that the slope at the edges don't have to be perfect like in commercial cork roadbed?
Furthermore, can you give the usual width and length of commercial roadbed?

Furthermore, can you give the usual width and length of commercial roadbed?