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.
Floating timber floor insulation.
Previously floor timbers had been prone to damp and rot thanks to their direct contact with the moist ground.
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.
Rockwool offers stone wool insulation products to meet and exceed thermal regulations in floor constructions as well as solutions for separating floors to prevent heat transfer between the upper and lower floors.
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.
They are very versatile and can be used to almost any type of flooring including solid concrete floors block floors and suspended timber floors and are an ideal solution for floating floor insulation.
The first is what lies under your floor.
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.