As upper mentioned the floating floor construction includes a number of layers carefully stacked up on top of each other.
Floating timber floor insulation.
Interior wood framed floor insulation.
Suspended timber floors located above an unheated space where the insulation is installed below the floorboards or timber decking timber floors situated above an unheated integral garage.
At the turn of the 18th century when construction techniques moved from boarded floors installed directly on the ground to suspended timber floors over a ventilated chamber the innovation solved a significant problem.
Previously floor timbers had been prone to damp and rot thanks to their direct contact with the moist ground.
If your wood floor is laid on beams then one solution would be to lift the old floor and to place either chip board underneath together with a suitable insulating underlay or to place mineral wool insulating material between the beams before re laying your floor.
All ground floor constructions unless very large commercial floors will require some insulation to be included within the floor zone to comply with building regulation requirements.
If the ground floor in question is of a suspended timber construction and whether this is a renovation or new build project then the insulation would normally.