Why does the COREtec floor use a cork underlay?

Each COREtec floor slat has an integrated cork pad. It is the COREtec creators' manuscript.

The cork mat, as a natural material from permanently renewable sources, is not only waterproof (because corks would not be used for wine), but is also perforated to allow heat from the underfloor heating to pass through well. It also has a leveling effect on the substrate, because it is enough to observe the unevenness of 4 mm per 2 bm (in the Czech Republic, the standard is 3 mm/2 bm, in the Czech Republic the standard is 2 mm per 2 bm).

Thanks to the cork underlay and its composition, the COREtec floor is also soundproof up to 20 db.