Same here! Thank you so much. I've got a good feeling now that I ordered the right amount. I was worried 10 yards would be too much, but it looks just right!
Hey you can lay this on top of clay but if you put too thick a layer you will kill your grass. My advice would be to use topsoil to level your yard. If you want to improve your clay, just aerate (remove the cores) and add 1/4-1/2 an inch of high quality compost. Much better than adding 4-6 inches of topsoil onto existing clay.