Thermal conductivity λ (W / m * K) is the ability of a material to conduct heat. The coefficient λ indicates the amount of heat flowing through 1 square meter of material thickness of 1 meter, with a temperature difference between inside and outside of 1 ° K. The insulating materials are characterized by a coefficient λ less than 0.1 W / m * K. For parquet resistance, thermal conductivity should not exceed approx. 0:17 sq m * K / W. Thermal conductivity for floors should be considered for the laying conditions as the ideal substrate should ideally meet the best features of compactness and thermal conductivity. In particular, in the case of floating (since conductivity calculationand thermal conductivity of any element can be contributing factors, such as sprains cause inconsistency in the size or the gap between the top layer of wood and support).