I've never heard of that? But putting something under it like a fabric would work.
Becky
This is what it looked like after the base was prepared but before it was finished...
It looks like really thick black felt and it comes on 15 foot wide rolls that are 300 feet long. The co-op where I buy it will sell it by the linear foot. This particular piece was 15X30. They cut it for me, folded it up and I hauled it home in the back of the Jeep. It cost $1.75 a foot so it ended up costing about $55. This fall I did the same thing in front of this barn as well as in front of the barn at my FIL's where the mares are. The mud had gotten so deep there that I couldn't even get in with a tractor. The fabric had gone up to $2.75 a foot, but it's still worth it. Getting in there is a breeze now.