Good question. But anythng flexible beneath tile would seem to be
problematic, in my opinion.

"Michael Baugh" wrote in message
...
Why is the cork on TOP of the concrete underlayment?

"pinya" wrote in message
oups.com...
So we are having
1000 square feet of porcelain tile installed over the Acousticork R60
6mm cork which is on top of our concrete underlayment