Dry systems for impact noise insulation of floors in laboratory

Dry systems have been successfully used in the last years and the diffusion in the market has grown a lot, especially in floating floor applications. These systems are made of a resilient mat supporting a rigid layer (a single or multiple layer of cement, gypsum, wooden boards, generally reinforced with fibres) and because of the easiness and rapidity of laying they are often preferred to traditional massive cement-based floating screeds. This work has the aim of investigating the impact sound insulation performance of some solutions based on products typically found in the traditional screed market, comparing the two different applications: dry and wet. The products have been evaluated in laboratory, using two different base floors, one standardized concrete slab and a beam and hollow block floor and with experimental approach also the influence of the load conditions of the floating floor has been evaluated.