Acoustics in buildings cannot ignore the use of low inertia radiant systems, for this reason RDZ has always been attentive to the themes of the insulation of pedestrian noise introduces two important innovations to be combined with its radiant systems: a desolidarizing acoustic mat to be placed under the low inertia radiant system called ACU UPL-M, and a second acoustic mat under coating, ACU UT-M which in the case of a sub-tile assumes the double advantage: in addition to acoustically insulating the flooring drastically reduces the risk of cracking of the coating even in the presence of accidental breakage of the screed.