Need help! About to install hard wood over sound proofing! What can we do?

We just receved our delivery of 3/4 inch solid hardwood flooring. We live in a condo and did not realize that what we thought was concrete was fireproofing and could not be removed. I know that we could add 3/4 inch plywood over the fireproofing and then add the floor on top of that, but we already have tile that will join the wood and there will be a large step. I was told that we could add a corking over the fireproofing instead of the plywood....Is that correct? Will that floor nail to corking? Do they have a thin layer of fire proofing material that we can us to replace the old which is thinner? Any suggestions would be greatly appreciated.

 

Not too sure how you ended up in the predicament, you can't use 3/4" on concrete either. You cannot nail 3/4" solid to cork. You have the wrong material for your needs. Its plywood or nothing.

 

You can glue a solid to acoustic Cork. I am not familiar with the procedure, as I do not do these installs but they do them in high-rises. They are really tricky and are better left to an experienced pro that does this particular kind of installation.

 

Are they guing 3/4' or one of the new thinner mills? it is very very difficult to glue 3/4". Drawing up slightly bowed boards and then holding them down is a mess.