Percussion noise insulation consists in reducing the noise level of impact noises on the slabs, transmitted to the floor immediately below. For an effective reduction, it is necessary to guarantee a total independence between the floor and the property´s flooring and structure. The interposition of an elastic element, expanded cork agglomerate, between the flooring and the slab, produces a reduction in the transmission of vibrations and noises resulting from impacts. It will also be important to maintain the discontinuity between the flooring screed and the surrounding walls, thereby eliminating marginal transmissions.