I would look into the filter cloth and balance that cost and the cost of digging the top soil out. You can lay down the filter cloth and put the recycled concrete on top of it then top dress 12"s is lots of 4" then top dress.

The rock will keep pumping into the top soil when it is soft and wet if no filter cloth is used. No filter cloth used dig out 4 feet of the top soil and load in the crushed concrete and top dress. The biggest thing I have learned is the sharper the stone the better it will pack and hold.

Cheers Don.

Last edited by DonoBBD; 09/17/13 06:23 PM.
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7/8th of an acre, Perch only pond, Ontario, Canada.