Sparkler

hi,
This is taken from the internet:
Floating floors are designed to be installed onto a concrete subfloor, or any other flat, firm and level surface without the need to use battens, nails or glue. They "float" because they are not attached to the subfloor in any way, and therefore can be installed very quickly. The mass of the floor keeps it in place.
Floating floors made from wood can consequently expand and contract with the changing seasons without cracking, splitting or forming gaps. A floating floor is usually installed on a special underlay, which acts as a moisture barrier and sound absorber.

I hope that helps

thanks

Sparkler